S8: Back strengthening
Key instructions
Sit with an elastic band or towel between your hands and keep your back straight. Hold the elastic in front of your chest with your arms straight:
Exhale and pull the elbows back, tightening the abs (keep the shoulders relaxed).
Inhale and return to the starting position.
Repeat.
Sets x reps
2x10 repetitions
Rest between sets: 30 sec to 1 min 30