Interval timer - 40 sec work / 20 sec rest - 60 ROUNDS - Cronometro: 40 trabajo/20 descanso
37:20
Interval timer - 40 sec rounds / 15 sec rests (40/15) - 40 ROUNDS -Cronometro 40 trabajo / 15 descan
1:00:46
Interval timer - 40 sec rounds / 20 sec rests (including links to 19 workout routines)
59:39
30 sec work 30 sec rest Interval Timer (30/30 interval timer) up to 60 reps
41:04
Interval timer - 40 sec rounds / 20 sec rests - 40 ROUNDS - 40 seg trabajo / 20 seg descanso
30:03
Interval Timer 20 Second / 10 Second Rest
1:00:02
[TooL] - 1 Hour Stopwatch Digital Workout Clock
34:05
Interval timer - 40 sec rounds / 10 sec rests - 40 ROUNDS - Cronometro 40 trabajo / 10 descanso
30:07