A majority of training in recreational climbing is often hangboards, weight-lifting, and some dry-training (speed work). Unfortunately this appears to work only on the ends of the training spectrum. Elite climbers incorporate a significant portion of power into their training. This is known as contrast training. Contrast training is an advanced method for improving both strength and power through combining high-load strength exercises with plyometric movements targeting the same muscle groups. Research shows that heavy loading of a muscle induces a high degree of central nervous stimulation lasting from 5 to 30 minutes.