A quick technique note on improving your rope climbs!
To improve your rope climbs consider the following tip to get a more secure hold with your feet and therefore take the onus off of your arms. When scooping your bottom foot to create a foot lock simply continue the bottom foot over the top and step on the forefoot of the other foot. The first picture shows the very common but not as secure foot lock used in the gym. However, the second picture shows the foothold with the scoop foot over the top and on the other foot. This foothold is more secure and will not require more time on your part. After getting used to the change you should expect rope climbs to be less fatiguing on your upper body. Also check out this short video from CrossFit games competitors, Matt Chan and Spencer Hendel, explaining how to properly secure this foothold.