Task: Question Answering
Input (English): Passage: My gym is about 3 miles from my house , so I shower at home after working out . Therefore , I put on my workout clothes at home . I have special shoes that I wear to support my feet well while working out . I drive the short trip to the gym . I do n't walk because it is often hotter than 110 degrees in Phoenix . At the gym , they scan my membership card so they know that I am a paying member . I take my gym bag to the locker room and leave my billfold and car keys in the locker while removing my exercise planning book and my weight lifting gloves from the gym left in the locker . I lift heavy weights to sustain my muscle mass . Then I use a stair machine to tone tone my legs and to build my respiratory capacity . Then I use the treadmill and walk 2.5 miles at a good pace for both my respiratory and circulatory systems . Question: What did they want to keep from hyper-extending? Option1: Their muscles. Option2: legs
Output (English): Their muscles.