She got on the bike and began to pedal. After about 5 min on the bike she began to get tired. βFuck this is hard, how did I get so out of shape this fast? Last week I was running 3 miles a day, itβs barely been 5minutes and I feel like Iβm going to have a heart attack!β She kept going for 15 minutes but she was barely pedaling. Every time she pedaled, her knee would bounce off of her belly. This was incredibly uncomfortable for her.