1. Inside means within something else.
Pattern: verb + noun + inside + noun
There are some little toy animals inside the box.
She put the money inside the envelope.
2. Inside (adverb) means indoors, within a building.
It started to rain, so we went inside.
Rotating Triceps Kickback
Stand with your knees bent and lean forward slightly, with a dumbbell in each hand. Bend your right elbow to bring the dumbbell to your side, making your upper arm parallel with the floor. Press the dumbbell back, and as you straighten your arm, rotate it so that your palm faces the ceiling. Rotate it back so that your palm faces in, and return your arm to the bent position. Do 12 to 15 reps with each arm.