AthleticQuickness.com now has two running speed challenge videos. The first speed training challenge video has one hip flexor exercise that you are to do three times a day, three days a week for the next two weeks. The latest running speed challenge video has three hip flexor exercises that ask you to do each one, one time a day, three days a week for two weeks. The hip flexor muscles are one of the most under-developed muscle groups in the body and are very important to your running speed. That's what these challenge videos are all about.... to see if you can run faster after doing these hip flexor exercises for just two weeks, or, to set a personal best in just 14 days. You are asked to time yourself before starting these exercises in sprints such as the 40 yard dash, 100m or 200m. You can also do this for the longer races such as the 400m, 800m and 1,500m. These exercises use the resistance band with an isometric training strategy on the hip flexors at various planes and angles to target your psoas, rectus femors, adductor brevis, adductor longus, pectineus, sartorius and iliacus. The expectation is for you to increase your running speed in just a matter of days. These isometric exercises can be done alongside any other training. You are advised to do them when you are well rested so as to give the best effort. The videos explain everything you need to know about doing them correctly. You can also go to our website and read the instructions at your own pace. athleticquickness.com/take-the-9-minute-running-sp… Many athletes looking to run faster in their sport have found success by doing the isometric exercises in these videos. You can watch either video, first, it does not matter.