Gesture drawing as a warm up exercise can get boring. Here are a few tips to help keep it interesting:
1. Get lots of sports photos to work from. 100 or more recommended. You certainly won’t benefit from doing the same 10 over and over.
2. Ask a family member to pose for you. Have a list of poses for them such as “shoot a basketball”, “swing a golf club”, etc. They only have to hold the pose for about 10 seconds. (Gestures are fast.)
3. Use a sports movie or show and freeze the action to sketch from.
4. The ultimate gesture challange is to work from a sports movie and only freeze the action in your mind. You can do this as a sport spectator too.
The main thing is to make it fun so that you will keep practicing. Draw on!