Comparing the two climbers is very interesting as well - we see two very different styles: neither is "right" or "wrong", but we can clearly see one climber who makes more use of upper body strength while the other is more reliant on foot placements and flexibility. The latter style will pay dividends on technical climbs with small holds. Both climbers are very experienced and have climbed at very high technical levels; the first is Ian Dunn and the second is Katherine Schirrmacher.
Katherine's style may be compared to an ice climber, where the feet are moved high, suspended from straight arms, then the powerful leg muscles are used to project the climber upwards, with the hands used more for balance than pulling. The sideways footage shows how the pelvis moves out from the wall to position the feet then pulled towards the wall, often by dropping a knee, so that the upwards push takes place with the centre of gravity pulled more over the feet. Body rotation is quite evident here as well and became even more obvious when I filmed a further ascent with her wearing a chalk bag - the trajectory taken by the chalk bag provides a clear marker for the pelvis rotation.
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