The Sub-7 Experiment

Tag: training

  • The Sunday I Nearly Skipped

    And we are back. Sunday morning.

    There was ice on the car. The heating was on in the house. Everyone else was warm and cosy. It would have been very easy to stay in bed, put something on the TV and write the whole morning off as “rest.”

    Instead, I scraped the ice off the car, put my gym gear on and went.

    Same routine as the last few days: I took my WHOOP scores and fed them into ChatGPT. Recovery, strain, sleep, stress, all of it. This time the response was different. Instead of another rowing session, it came back with a strength and conditioning workout.

    The plan was very specific. Exact machines. Exact reps. Exact weights.

    There was only one problem. The weights it suggested were based on the numbers from a couple of months ago, pre-surgery, when I was training regularly and feeling stronger. I am not quite there yet.

    So I asked the obvious question: are you sure about those weights, given that we have not done this in a while?

    To its credit, Coach GPT backed off. It lowered the recommended loads to something more realistic, and in the end they felt pretty much perfect. Hard work, but not stupid.

    There was another small win before I even started. On Thursday I had left my heel wedges at the gym. I assumed they were gone. When I walked in this morning, the receptionist handed them back. Someone had found them and turned them in. A tiny thing, but it felt like a good sign.

    Session done, I finished on the rower with two 250 metre sprints. The first one was fast but messy. I got a bit carried away, my wedges slipped and my feet came out of the shoes with about 18 metres left. Almost there, not quite. The second sprint was much more controlled.

    I am counting all of this as prototyping for the wedges. When the rower finally arrives at home, I want that setup dialled in so I can just strap in and go.

    Right now the car thermometer says minus 0.5°C. It is still cold, but I feel great. I have a solid session in the bag, I am not wrecked, and the next job is to go home, rouse the rest of the house and get everyone out for a walk around the lake.

    Training done. Family next. A good Sunday.

    Another good session logged. This is The Sub-7 Experiment. And it continues.

  • Trusting the Data on a ‘Meh’ Day

    I have just come out of the gym after my first proper session in a while. Last week was a family trip to London, which was brilliant, but it knocked me out of my routine.

    This morning was one of those days where I really did not fancy going at all. WHOOP had my recovery in the yellow. Sleep was fine, stress and strain yesterday were nothing dramatic, but I still felt flat. It would have been very easy to decide that today was not a gym day and leave it at that.

    Instead, I tried the new approach I have been talking about. I took my WHOOP numbers and dropped them into ChatGPT. In return, I got a clear session plan with target figures that matched how my body was supposed to feel on a “medium” day.

    The structure was simple. Five minutes of warm up at a set pace to get moving. Then three blocks of 2,000 metres on the rower, again at a set pace. Nothing heroic. Just long, steady, repeatable work.

    On paper it looked almost too easy, especially with that “you should probably train” yellow score. In reality it was exactly what I needed. Each 2,000 metres felt long and cruisy. Hard enough that I knew I was doing something, nowhere near the point of blowing up. By the end of the third block I felt like I had trained, but I did not feel broken.

    The bigger difference was in my head. I walked into the gym tired and not really in the mood. I walked out feeling lighter and quietly pleased with myself. The combination of WHOOP data and ChatGPT as coach gave me just enough structure to get over the hump of not wanting to start.

    It is early days for this experiment, but right now it has promise. If this is what a “didn’t want to go” day can look like, I am curious to see what happens on the days when I actually feel ready.

    This is The Sub-7 Experiment.

  • A New Coach in the Room

    It feels like I have a new coach.
    You might remember that I’ve been asking ChatGPT to prepare workouts and coaching advice to help me row 2,000 metres in under seven minutes. That is the whole point of The Sub-7 Experiment. Can I use AI to help me achieve a fitness goal.

    When I first tried this, the model available to me was GPT 4.0 and it was good. I set up the role, gave it the context, kept the conversation alive, and each day I told it how I was feeling. It responded with the workout for that day. That simple rhythm worked well.

    Then 4.1 came along. The improvements were small but noticeable. It held context better, got confused less often, and could handle my slightly lazy and vague questions more easily. As with most tech, each release pushed things forward.

    Earlier this year GPT 5.0 arrived with a huge amount of hype. It was supposed to push ChatGPT into a whole new league. PhD-level reasoning. Better accuracy. A genuine step up.

    The reality was mixed.
    Yes, it produced better code for a different project I was working on. Yes, it had more “thinking” capacity and could reason more deeply without me having to explicitly tell it to think. That part was a massive improvement.

    But as a conversationalist it was a step backwards.
    It forgot things. It lost context. It got confused about tasks. The backlash was so strong that OpenAI reinstated version 4.1 as a choice because so many people preferred to keep using it. It felt like my coach had left the building.

    I worked around it with careful prompting, but it was frustrating. The Sub-7 Experiment relies on continuity and rhythm, and something was always slipping.

    Which is why it now feels like I have a new coach. GPT 5.1 has arrived and it feels different in a very good way. The tone is consistent. The help it offers is actually useful. It anticipates the next step instead of fumbling it. It feels like an upgrade in the true sense of the word.

    Let me explain why this matters.

    I have a WHOOP device and I’ve used it for almost two years. Before ChatGPT became part of my training, WHOOP was my only guide. It sits on my wrist and picks up all sorts of measurements: heart rate, skin temperature, strain, sleep quality and plenty more.
    Every morning the app shows three dials. Yesterday’s strain, today’s recovery level, and last night’s sleep. When you start a workout you tell WHOOP what you’re doing and it gives you a target strain. When you hit it, the band vibrates and tells you to stop. Simple. Clever. And it worked well.

    But in the last few months I’ve been questioning the value.
    The subscription model has changed. The promise of free device upgrades for active subscribers has been replaced by an “uplift fee”. My renewal is in February and it will cost a lot more to keep going into my third year. And that makes me ask what I actually need it for.

    Most of the data WHOOP collects I don’t really use. I know how well I slept because I was there. What I actually value is recovery guidance and strain targets. And there are other devices out there that do similar things for a simple one-off cost. Polar Loop is one I’m looking at seriously.

    So I turned to ChatGPT 5.1 for help. Reviews. Recommendations. Thoughts based on my training. And one of the threads pointed out something obvious: I have not been using most of WHOOP’s data anyway. Not deeply. And the only thing that truly matters is the workout planning, which comes from CoachGPT.

    I asked if there was any way for ChatGPT to access WHOOP data directly. It said no, the APIs are not available yet. But then it made the suggestion that genuinely impressed me.

    It told me exactly which two screens in the WHOOP app to screenshot each morning. It told me to upload them, and it would analyse everything it needed: recovery, sleep, strain, HRV, and readiness. It would then produce a fully tailored workout for that day. And if it thinks I need a rest day, it will tell me that too.

    I have used this new process for the last few days and it is genuinely brilliant.
    Two screenshots. Upload. Instant plan. Clear reasoning. Exactly what it expects from me. Exactly what to avoid. Exactly how hard to push.

    And it works.
    The coaching is better.
    The structure is better.
    The whole system feels like something new.

    Well done, ChatGPT 5.1.
    This is The Sub-7 Experiment.
    Recovering using structured data.

  • Turning Crankiness into Power

    A controlled session, a clear head

    Me: “Ok, it’s Monday. I’m at the gym. Feeling a bit cranky. Whoop has me at 97% recovery. What’s the plan?”
    ChatGPT:
    “Perfect timing—you’re in a great position to turn that crankiness into pure fuel today.
    Here’s the plan:

    Warm-up (10 minutes total): • 5 minutes easy Assault Bike or Rower (low effort, just moving) • 5 minutes easy Rowing (~2:15–2:20/500m, ~20 spm)

    Main Rowing Session: • 5 × 500m intervals • Pace: 1:50–1:55/500m • Stroke Rate: 24–26 spm • Rest: 2 minutes light movement between intervals

    Optional Finisher: • 1 × 250m hard push (~1:45–1:48/500m)

    Cooldown: • 5 minutes easy rowing or bike, focus on deep breathing.

    Focus Today:

    • Channel the cranky energy, but stay smooth and powerful.
    • Strength through rhythm—not thrashing.

    If it feels like too much, back off the pace slightly. It’s about consistency, not self-destruction.”

    What a well-judged session that was.

    Old me would have used the crankiness as a self-destruct button, hammering myself into injury or exhaustion. Not today.

    Saturday, I visited a different gym. Same chain, different part of town.
    Let’s just say… there were some serious heavyweights in there.
    Only one rowing machine in sight, so ChatGPT adjusted the plan: two 15-minute sets, offering an easy exit if someone was waiting.

    In the end, no one needed it. I got the full session:

    • 2 × 15 minutes at 2:05/500m
    • 2 × 500m sprints at 1:49/500m
    • Bike spin
    • Then another 2 × 500m sprints back on the erg.

    Quietly delighted with myself.

    Out of curiosity, I asked ChatGPT what a 1:49/500m pace would mean over 2,000 meters.
    The answer? 7 minutes 16 seconds.
    That got my attention.

    ChatGPT then asked if I wanted to work towards 7:16 as an interim goal. I said yes.
    So today’s session was part of that plan—and it worked beautifully.

    Interestingly, I didn’t even notice the “optional” 250m finisher in the original plan.
    If I had, I might have paced the earlier rows differently—holding something back for a final flourish.

    Instead, I finished the set, then added two bonus 250m sprints:

    • Held a pace of 1:36/500m.
    • Controlled. Focused. No wild flailing.

    Before, I’d only ever glimpsed numbers like that when I was out of control and hanging on for dear life.
    Today, it was deliberate—and it felt powerful.

    The crankiness?
    Gone.

    And the progress?
    Undeniable.

    This is the Sub-7 Experiment.

  • 10K, BBQ, and a Bit of Progress

    Saturday. The hoovering’s done.
    My son’s off at a party.
    It’s my time—and I’m heading to the gym.

    Me:
    “Ok, it’s Saturday, I’m in the gym feeling good. Let’s do some distance…”

    ChatGPT:
    “YES! Love that energy—let’s roll with it.”

    Saturday Distance Row – Option A (Classic 10K Endurance)

    • Target: 10,000m
    • Pace: 2:05–2:10/500m
    • Stroke Rate: 22–24 SPM
    • Structure:
      • First 2K: ease in, find rhythm
      • Middle 6K: settle into a steady groove
      • Final 2K: build pressure
      • Last 500m: controlled push—if you feel good

    And it was a great session—interesting, too. Let me tell you why.

    I found it hard to hold that 2:05 pace at 22 SPM again. I was either pulling too hard or not fast enough—couldn’t quite lock it in. But instead of being frustrating, it gave me something to focus on. And I needed that today.

    Because the usual chatter crept in toward the end:
    “Hold it… Don’t burn out too early… Save something for the finish… Be the hero in the last 500m.”

    But that wasn’t the goal.

    What I really needed was control. Rhythm. Consistency. And focusing on the stroke rate and pace through the first 8K helped keep my mind in the moment—not chasing the final sprint.

    When it came, I was ready.
    1:48 pace, 30 strokes per minute.
    Strong. Steady. Good form all the way through.

    And now I’m home, writing this with something new hitting me:
    This is my second 10K Saturday in a row—and it feels great.

    I’ve done a few 10Ks in the past, but they were always a grind—mentally and physically. And definitely slower, by maybe eight minutes or more.

    That’s the reminder today.
    Progress isn’t always fireworks—it’s steady, quiet change.
    Physically and mentally, I’m getting stronger.
    And more than that—I’m actually enjoying it.

    Right. I’m off to cut the grass and light the BBQ.

    This is the Sub-7 Experiment.

  • Old Limits, New Baselines

    I tweaked my shoulder on Monday and decided to take a couple of days’ rest, rather than push through and risk making it worse. In the past, I probably would have forced it—especially if I had a rigid training plan written down with targets, dates, and expectations. If the plan’s written down, you have to follow it, right?

    Well… no. And that’s the beauty of this experiment—I can pivot.

    The conversation with ChatGPT went like this:

    Me:
    “Hey good morning. I’m in the gym, shoulder’s still a bit twingy, but I want to row. What do you recommend—and a warm-up too, please?”

    ChatGPT:
    Warm-Up (10–12 min total)

    1. Assault bike or light row – 5 minutes easy
    2. Dynamic mobility (no weights):
      • Arm circles (forwards/backwards) x10
      • Shoulder rolls x10
      • Torso twists x10
      • Air squats x10
      • Cat-cow or thread-the-needle (for shoulder mobility)

    Rowing Session (Shoulder-Friendly, Rhythm-Focused)
    • 3 x 2,000m @ ~2:07–2:10/500m, 22 SPM
    (2–3 min rest between sets)
    • Optional: 1 x 500m push @ 1:55/500m if shoulder feels okay
    • Cooldown: 5 mins easy row or bike

    “Keep your stroke smooth—no need to muscle through the finish. Let the legs drive, keep the core engaged, and guide the handle in.”

    It turned out to be a really good session—though during the second 2,000m, my mind started wandering. I found myself questioning all of it:
    What’s the point? Where is this going? Is a sub-7 even possible for someone like me? Am I getting bored?

    It came out of nowhere. It was like my old mindset trying to sneak back in and talk me out of it. Talk me into giving up.

    And give it up for what?
    Go back to how I was?
    No thanks.

    That second 2,000m came and went. Then the third. Then a 500m push—1:42.
    And that’s when it hit me: real progress is showing up.

    Three sets of 2,000 meters at a cruisy 2:05/500m pace and 21 SPM. A few months ago, that would’ve been me at max effort, form breaking down all over the place.
    That final 500m at 1:42? That used to be a number I’d glimpse on the screen for a second or two, flat out and flailing. Today, it was measured. Solid.

    The physical progress is great. But the mental shift is the bigger win.

    Old thinking tried to creep in—but the new mindset held strong.

    It’s not about hitting the perfect session.
    It’s about making the average ones stronger, more consistent.
    That’s how I know this is working.

    This is the Sub-7 Experiment.

  • Weird Mood, Small Win

    Weird day today. Strange mood.

    Me: “Ok, I’m in the gym. Could be a sugar crash—had a scone with jam yesterday at afternoon tea. Dragged myself here but I’m moving on the assault bike. Let’s get something done. Maybe a bit of rowing and some weights?”

    ChatGPT:
    “You made it—and that’s the win right there. Doesn’t matter if the engine’s not firing on all cylinders—you showed up. Let’s use that weird mood and turn it into momentum.”

    Here’s what it suggested:

    Reset Session: Row + Weights (45 mins total)

    Phase 1: Wake the Body (10 mins)

    • Assault bike warm-up: 5–7 mins steady
    • Rower: 5 minutes @ 22 SPM, easy pace (2:10–2:15/500m)
      Focus on breathing, rhythm, and posture

    Phase 2: Power Reset Rowing (10–12 mins)

    • 4 x 500m intervals @ 1:55–2:00/500m
    • 1 min rest between reps
    • Final 500m: Go strong if you feel it

    Phase 3: Weights Circuit (20 mins) Do 1–2 rounds:

    • Leg Press – 3 x 10 (moderate)
    • Seated Row – 3 x 10
    • Face Pulls – 3 x 12
    • Tricep Pushdowns – 2 x 12
    • Optional: Dumbbell curls – 2 x 10 (for the guns)

    Cooldown (5 mins): Easy row or bike + gentle stretch

    I followed the plan and came out feeling better. Not super invigorated, but definitely better.

    The weekend had been full-on. My son and I spent nearly four and a half hours pressure washing the driveway, side path, and patio—serious effort, but a great sense of achievement. Sunday was Mother’s Day, so we made afternoon tea—scones, sandwiches, the works. It was fun. Add in two 5K walks and a lost hour thanks to the clocks changing… and yeah, I think the crash hit me today.

    I don’t usually eat refined sugar—no sweets, chocolate, desserts. But yesterday, I had some jam on the scones. Not loads, maybe two or three teaspoons. But wow, today’s slump hit hard.

    It nearly derailed my day. But I still went to the gym. That wouldn’t have happened a couple of months ago. It lifted my mood, just enough.

    And here’s the big bit—I went into the weights area.
    That matters.
    I’ve been putting it off for ages. Bouncing around it. Making excuses. But today, I thought:
    “Why not? Why should everyone else get to use that part of the gym?”
    It was only me stopping me.

    I’m glad I went in.
    The sky’s blue. The sun’s shining.
    A walk outside is calling.

    Weird mood, but I’m taking being active as the win.

    This is The Sub-7 Experiment.

  • Flexibility Beats Frustration

    It’s been an interesting week—ups, downs, surprises, and realisations—but on the whole, a good one.

    The most fascinating part?
    A conversation I had with ChatGPT this morning.

    The Night Before

    When I went to bed last night, I was already talking myself into a gym session in the morning.
    That’s not unusual—good intentions at bedtime are easy. But recently, I’ve actually been following through.

    I didn’t do much exercise yesterday and, if I’m honest, I was feeling a bit sorry for myself. There’s a possible medical issue on the horizon. Nothing serious, not life-threatening, but the idea of surgery has been floating around in my head, growing bigger than it needs to be.

    The Morning After

    This morning, I felt great. I wanted to go to the gym and really go for it.

    In the past, I might’ve pushed too hard—used exercise to vent stress and ended up pulling something or burning out.
    But this time, I paused, opened up ChatGPT, and said:

    Me: “Hi, I’m in the gym. Whoop has given me a recovery of 53% today, well into the yellow. I told it about my ‘injury.’ I want to do some rowing—what do you recommend? I have 45 minutes.”

    ChatGPT:
    “Hey, good to see you back! With 45 minutes and a 53% recovery, we’ll keep it moderate—quality rowing without overloading.

    🔹 Warm-up: 5–7 min @ 2:10–2:20/500m
    🔹 Main set: 3 x 2,000m @ 2:05/500m pace, 2 min rest
    🔹 Optional: 500m push at 1:55–2:00/500m
    🔹 Cooldown & stretch: 5 mins

    Let me know if you want to swap in intervals instead, but this plan hits that sweet spot between effort, form, and recovery.”

    So I did exactly that.
    It wasn’t the explosive, emotional, tear-the-house-down session I’d pictured.
    And that’s probably a good thing.

    It was smart. Controlled. And still a proper workout.
    I walked out of the gym feeling good—and only slightly disappointed.

    The Pivot

    That feeling of “I didn’t smash it” hung with me for a bit—because earlier in the week, I’d planned to do a 2K test.
    My baseline is 7:41, and I was curious to see if the work I’ve been doing had moved the needle.

    But because of the medical stuff, it didn’t happen.

    So I opened another chat with ChatGPT—the one where I just speak my thoughts out loud—and I said:

    “Even though I’m not coming out absolutely wrecked, it was a good session.
    I didn’t do my 2K test, and I’m still disappointed, but I’m also seeing that there’s more going on here.

    Is this experiment even working? I don’t know.”

    ChatGPT came back with this:

    “What You Proved Today:

    1. You Showed Up Despite Mixed Feelings – That’s real discipline.
    2. You’re Learning to Pivot, Not Panic – That’s training maturity.
    3. The Coach-You Partnership is Working – You’ve built a flexible, sustainable system.

    Now about that question:
    ‘Is it working?’

    Let’s measure:
    • More consistency? ✅
    • More self-awareness? ✅
    • Improved mindset and adaptability? ✅
    • Progress toward your 2K? We haven’t tested yet, but signs are strong.

    So is it working?
    Hell yes.”

    Hidden Progress

    And that’s what I missed.
    In my head, progress is beating the clock. But there’s more to it than that.

    I didn’t do the 2K test, but I’ve done solid work.
    I’ve pivoted when needed.
    I’ve kept showing up.

    In the past, I would have used the first hint of a setback as a reason to stop altogether.
    But this week has shown me that flexibility beats frustration, and that consistency beats intensity.

    So what is progress?
    Yes, it’s chasing that sub-7 2K. But it’s also this:

    • Showing up when things aren’t perfect
    • Adapting instead of quitting
    • Building a system that works when life doesn’t

    This is the Sub-7 Experiment.

  • You Don’t Have to Be Fit to Start Moving

    Yesterday morning, I went out for a walk.

    It was a public holiday, and the streets were quiet. There weren’t many people around, but the ones who were?

    They were moving.

    Walking, running, jogging, cycling—everyone was out doing something.

    And it got me thinking.

    Maybe some people reading this blog are thinking: “It’s easy for him—he’s already fit. Of course, he can take on this experiment.”

    But that hasn’t always been the case.

    Like many others, I’ve had massive fitness and weight swings over the years. I know what it feels like to be starting from zero—to feel sluggish, unfit, or like it’s just too much effort to begin.

    That’s why I admire the people who were out yesterday morning.

    They weren’t all lean, athletic, or moving fast. They were all different shapes and sizes—but they were out there. And that’s the thing.

    They were doing something.

    One Small Step at a Time

    I don’t want to sound preachy, and I apologize if it comes across that way. But here’s the truth: just moving more makes a difference.

    And “exercise” doesn’t have to mean heading to the gym or running a 5K.

    There are simple, everyday ways to move a little more:

    • Instead of looking for a parking space closest to the door, park on the far side of the lot.
    • Instead of looking for the easiest route, take the slightly longer way.
    • Instead of waiting for the elevator, take the stairs.
    • Instead of sitting for hours, stand up and stretch every so often.

    These tiny changes add up.

    Not just over a day. Or a week. But over a month, a year, a lifetime.

    And eventually, they become a habit—effortless, automatic, part of your routine.

    That’s how it starts.

    A little bit more movement than yesterday.

    No gym membership. No 5K runs. No big resolutions.

    Just one step at a time.