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.
1 Use your right leg to help you push off the ground and kick your left leg up and over your body. Keep your left leg straight as you move it off the ground, and think about moving it directly over your body.  Don't let your left leg or right arm sway to the sides. Keep them straight as you move into the bend.