Leg Extensions: 5 sets of 13-20 repetitions
My first exercise was leg extensions. I started with a light weight for 18-20 repetitions feeling each repetition as I worked on getting some blood into the muscles. I then increased the weight for the first working set, in which I performed 20 more repetitions this time to failure. Each repetition was paused at the top for a one second count and the last repettion of each set was held for as long as possible at the top contracted position. I kept increasing the weight on each set until the last two sets were performed with the whole stack of the machine for 13 solid repetitions. The rest period was around 1 minute in between sets.

Full Squats (going below parallel): 3 sets of 12-15 repetitions.
Since I did not have much time I decided to do full squats as opposed to squats to parallel. This was done in order to engage the hamstrings more at the bottom of the movement and thus maximize results in the whole leg. Since the squats were done through the full range of motion, until the calves were tightly pressed against the hamstrings, the weight used was lighter than the one I would have used for the parallel squats version. I held the bottom position for a second and then pressed with the ball of the foot to bring myself up while keeping the torso as straight as possible. For this exercise I rested around 90 seconds.

Walking Lunges: 3 sets of as many steps as possible.
I finalized the upper legs workout with walking lunges. My legs were so beat from the previous 2 exercises that I could not use any weights. What I did for this exercise is that I lunged to one side of the gym by pressing with the ball of the foot (in order to emphasize the quads), and on my way back to the point I started, I pressed with the heels (in order to emphasize the glutes and hamstrings). For this exercise, I rested around 75 seconds.

One Legged Machine Calf Raises: 4 sets of 18-20 repetitions.
I performed the one legged calf raises on a calf raise machine and used a weight that would allow me to do between 18-20 good repetitions emphasizing the stretch component of the exercise (spending 1 second at the stretch position) and then pressing with the ball of the foot to lift the weight up remaining at the contracted position for a second as well. This exercise I performed non-stop just alternating one leg and the other until all sets are done.