Which HITT coombo would be less stressful on my back:
treadmill, outdoor running,stationery bike, stairs? Or is there something I am not thinking of?
Also question about stairs...would you just try to run up them as fast as possible for 20 sec or would you be hitting every second starir, not sure if I know how to do stairs with HITT?
treadmill, outdoor running,stationery bike, stairs? Or is there something I am not thinking of?
Also question about stairs...would you just try to run up them as fast as possible for 20 sec or would you be hitting every second starir, not sure if I know how to do stairs with HITT?