If you have a little money to spend, invest in a pair of 5- and 10-pound
dumbbells and an exercise ball. Hold the
dumbbells and do biceps curls, triceps extensions and side raises to work the arms and shoulders. Hold the weights at your sides as you do lunges and squats. Use the exercise ball to do crunches for your abs, planks for your core and shoulder bridge exercises to work your butt and hamstrings.