Do leg press burn-outs! Start with a high end, close to max (after warm-up), weight...This might be like, not knowing your strength, say 10 plates per side...Do all you can in one set..get up and pull a plate from each side... sit your ass right down & do it again. Keep going till your plates are down low.
Now for the good part; go for a road bike ride. Your legs will get strong, very strong!