after reading all your advice about only doing stuff on your rest days that you don’t need to recover from( walking ),can you give me your opinion on these alternatives?, particularly the ones that involve a lot of upper body/core muscles.
Each would be done at moderate intensity to be able to keep heart rate up for 30-40 min, resting when needed.
-Heavy bag or Mitt work
-Assault bike (steady state)
-Erg/Rower (steady state)
Thank you for your time Coach!