10 d/u - 10 situps - partner does wall sits
20 d/u - 20 situps - partner hangs from the pull-up bar
30 d/u - 30 situps - partner does wall sits
40 d/u - 40 situps - partner hangs from the pull-up bar
50 d/u - 50 situps - partner does wall sits
60 d/u - 60 situps - partner hangs from the pull-up bar