To increase the intensity and pace, most people tend to hold the handles of the bike hard. That indeed gives you power and speed to ride faster, but also comprises your form.
To hold the handle hard and increase the speed most people lean forward, which curves their spine, compromises their posture and makes them more prone to back problems.
Besides, holding the handles hard puts extra pressure on your neck and wrist. After your workout session, you might feel intense pain in them.
Leaning on the handles also leads to numbness, tingling, weakness, clumsiness, cramping, and pain. It can also put pressure on the ulnar nerve that passes from your spinal cord into your hand.