Question for us "younger" folks that look to you as a role model and person to learn from both mistakes and successes. Do you think if you'd started MTN TOUGH or similar organized workouts any earlier in your life that you would be in a better position physically? IIRC you used to just do big hikes all summer then a couple years back switched over to MTN TOUGH? I'm 38, doing the Exo Experience Challenge and put in for unlimited sheep as more of just a way to dip my toes in and have some measurable goals and a hunt to "prepare" for. Several of my friends in their 30's have done or are doing MTN TOUGH but I think I am similar to how you probably were in your 30's and 40's and pretty much despise gyms and working out so have subscribed to your hikes for the past decade or so. I would rather hike all day in the mountains than spend 30 or 60 minutes in a gym, but I do realize I can't do that everyday so am coming around to the benefits of organized domesticated physical activity in my basement. The step-ups have been an eye opener at how weak my quads seemingly are, curious to see how this translates on the next big hike I do later this month.
I had ACL replacement and meniscus repair at 35 and never felt like I quite got my legs back since then despite regimented PT for 6 months following surgery. My right knee sounds more like crunching a bag of potato chips when I do squats but I have little to no discomfort

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Yes, if I had been diligent about workouts in my younger life, I think I would be in a better position today. Too much sitting over the years results in a core/back that just isn't what it could have been.
I started MTN TOUGH after my arm injury. I needed some help in understanding how I could modify certain exercises. In their assessment or me, it became obvious I had let that injury derail a lot of my normal routine. Honestly, I was in terrible physical shape. Marcus, seeing me struggle in the hunting season of 2023, politely suggesting I talk to the MTN TOUGH folks. He didn't want to come out and say it, but he was seeing my struggles that season.
I still like hiking. Good for my mind and my body. It gives me a different workout than in the gym that I think is helpful, especially for my ankles, knees, feet. I will hike until I can't walk. In the winter hiking comes with more challenges; snow, short days, cold, etc. A gym routine has kept me from falling completely off the wagon in the winter.
I look at some guys I know my age who were diligent about workouts and I see what my sedentary accounting life cost me. At the time, I could justify it as more billable hours, but I wasn't aware at the slow erosion it would have to my total fitness. With the benefit of hindsight, I wish that I had made time for 30-45 minutes of mixed cardio and strength workouts. Life would be easier now.
I also wish I was better about nutrition. I have a sweet tooth problem. I don't drink, smoke, or eat fast food and soda pop. But, my body has an ice cream and chocolate detection system that I've never been able to turn off. I'm 6' 2" and I weigh 210. I'd like to lose 10#, which I will be the end of hunting season. I should probably be 20# lighter. But, I struggle with the sweet stuff, so that might never happen.
We were talking at MTN TOUGH yesterday after the pack workout. If I had gained 1.5# per year while working at the office, that would have been the 45# I carried in that workout. It struck me how much more work it is for the person 30, 40, 50+pounds overweight. If my body had that 45#, I'm not sure I have the mental fortitude to get back on track. I hope I would. 1.5# per year is only 2 oz. per month. Had I been better at nutrition, I suspect this 10# I want to lose would have never been there.
What I notice more than anything at this age is the need for setting my own pace and getting adequate rest. Too fast and I burn out quickly. Up too late and I'm not worth a crap the next day.
Summary to your question - Yes, I think if I had done more than just hiking while being a desk jockey, I think it would have been very beneficial today.