Pull-ups: W has = GH = MGH = 60kg× 9.8n/kg× 0.5m = 294J, because no extra work is given, it is not considered as total work.

Hard drawing: 35kg×9.8N/kg× 1m=343J.

Bench press: 30kg× 9.8n/kg× 0.4m =117.6j.

Because the muscle position in exercise is different, the biomass energy consumed should also be different.