"Leg Day!" Leg training is usually dreaded by those beginning a fitness program or skinny jean lovers. Because every day walking is not labor intensive on your legs, the first day of training your legs can be extremely crippling. If trained vigorously (and they should be!), your leg muscles will be left aching and sore for days to come. It's hard to walk, it hurts to bend over and you begin to think, "Is it even worth it?"
Do not let the initial pain deter you. Your legs contain the largest muscles in your body and are an integral source of power and directly correlate to upper body strength. They aren't typically viewed as "show-off" muscles, but having lower body strength is probably more important than upper body strength. After the first few leg workouts, you will notice your body adapt and the pain subside as your leg muscles repair themselves and become stronger.
Hold the phrase, "quality over quantity," to heart when training your legs. Legs are extremely powerful- because you will be training with heavy weights, it is important to nail down your form for maximum effectiveness and to avoid injury. Walking and running don't build large leg muscles; do these exercises to build your legs and a complete body: