Running while carrying a load under different conditions such as slopes and speeds is a part of military training [1], trail running [2], commuting
and conditioning exercises [3]. There have been different studies on effects of slope [4–6], speed [7,8] and load [3,9,10] on biomechanics of running.
However, only a limited number of studies analyzed the effects of multiple parameters in interaction (e.g. [3]) and, to the best of our knowledge, there has been no study on the effects of slope and speed during jogging with a relevant military load at slow speeds that are likely to occur at such slope and load combinations. Knowledge about the effects of slope and speed on the joint kinetics can be useful for understanding the performance requirements of different types of terrain and for preparing accordingly. Our aim is to study the effects of slope and speed on joint kinetics during slow jogging with a military relevant backpack load. We hypothesize that uphill jogging will increase positive work (mostly at the hip and ankle) [5, 6] and reduce negative work and that faster jogging will increase both positive and negative work (mostly at the hip and ankle) [3,7,8].