Use a regular chair for pushups dips. Here is a simple arm schedule you can do to strengthen the arms, strengthen the chest, tone the triceps and tone the chest, tone the biceps. Tone your arms without weights, do this arm routine in a hotel room, at home, in your dorm room, on the road, wherever. do 3-5 sets of 10 reps 3-5 time a week for maximum results. Really working shoulders, biceps, triceps, pecs and core.