Start Left

Work your weaker side first which is the left side for many of us, says Michele Olson, PhD, creator of the Perfect Legs, Glutes & Abs DVD. When you are fresh, you use better form and tend to do more reps. If you always work your weaker (or left side) last, such as with lunges, you may be unconsciously keeping your stronger side stronger and not giving your weaker side the extra attention it deserves.