Pure Nitro Max Wrapping your thumbs can reduce the effectiveness of certain exercises, including lat pulls. By just putting your thumb beside the index finger, you will decrease your arm muscles' involvement. Instead, your primary back muscles are the focus. The grip may feel strange at first, but it is more effective.Drink water regularly throughout the day. You produce heat through muscle fibers causing friction with one another, along with dehydration. When your body is too warm it can get dehydrated in response to excessive sweating.