Try riding a bike if you&#x27;re too heavy to run. I am naturally built for sprinting but I get huge satisfaction out of middle distance running. Over 5k and I start to feel as you described. I also enjoy lifting but it requires a partner, costs money to do and is inside, usually in a brightly lit artificial environment, so I only do it in the winter if at all. The bike on the other hand I can do for 6-8 hours no problem as long as I have enough food on board. I usually only do about 1-2 hours but I could really go for ever and always feel great afterwards. It just takes a little while to get used to sitting in the saddle. The first few rides might result in saddle soreness but after you get used it and buy a good set of shorts you&#x27;ll never look back.