
Originally Posted by
Flexor
Big toned legs are hot! Women develop big legs for their size because of wider hips and a bigger pelvis. It means there is muscle to start with and a greater potential for growth. Guys with broad shoulders build huge deltoids...
The difference between high and low reps is this. High reps will train your muscles for endurance and not recruit the fast twitch fibres as much (which are the ones that grow fastest and biggest). By doing high reps you will get more of a cardio workout and will train your slow twitch fibres which will mean technically you will build less mass, but will still build. Also note that most people's legs grow most with reps of 15-20, so you may want to increase either beyond that range or do cycling for half an hour (works calves, hams, quads, glutes, tib anterior, everything).
However, whatever exercise you do, it will not increase/decrease muscle tone. Any type of exercise on muscle that has never been worked will increase muscle tone. Once you've got tone from generally working out it can't be lost unless you stop working out. Definition is all about diet and greater development of the muscles. Bigger muscles are more developed and therefore are better shaped according to predestined genetics.
The only way you will lose bulk on your legs is by reducing protein intake slightly and doing an hour or so of lowish intensity cardio at a time (cycling is best as its easy on the joints). Then your body would realise that bulk was not the answer and would catabolise the fast twitch mass and replace it with high endurance, slow twitch highly vascularised muscle.
I hope this helps. How exactly do you want your legs to be?