But I started exercising during the pilgrim days, mornings, and the habit stuck but now I do evenings. I feel most productive now between 8am-noon, even with people around.

There was a job change too though, so can’t guarantee it was the exercise that changed things. Exercise was definitely a massive net benefit either way though.

I go really hard with kettlebells for about an hour/day. Very low-impact, no stress to the joints, loads usually not heavy enough to cause severe muscle failure. Cardiovascular/aerobic state is similar to running, climbing stairs, swimming, etc. The exercises are all compound, and there’s enough resistance to build a good amount of muscle too (kettlebells go up to 200lbs).

Flexibility too, most of the motions involve stretching from the hips in one way or another.

And all you need is a living room and a kettlebell.

I feel like I found the holy grail of exercising, so I take every opportunity to recommend it. Google Pavel’s Simple and Sinister routine if interested, or check out /r/kettlebell. I add overhead presses and standing rows, a lot of people add snatches and cleans. Always new things to try. It’s fun.