timing how long it takes for your kettle to boil 1 cup (250ml) of water. looking at the power of your kettle (Watts, often found on the base of the kettle) joules = wattage x time (in seconds)
Rock climbing can help build and tone your legs and glutes. Indoor rock climbing is a sport that when properly executed, recruits every major muscle group in the body. Rock climbing is a full body workout that tones and strengthens the arms, shoulders and core muscles. You can also effectively strengthen and tone your legs and buttocks with regular indoor rock climbing sessions.
Mountain climbers start in a push-up position with the arms extended straight and the legs extended behind you. To get going, bend one knee and draw it toward your chest, planting the ball of the foot on the floor under your hip. From there, extend your bent leg back as you draw the other knee toward your chest.