Which burns more calories arc trainer or spinning

Hello Virginia Mellace,
Probably the arc trainer because the body efficiently uses the larger muscles of the hip more than when spinning. Although, it still depends on the effort used. If a person uses one equipment more than the other, that would be the bigger calorie burn…or, if a harder workload is used.
Cross training still seems to be the best way to go for many reasons, one being, decreasing overuse injuries.
Take care,
Natalie aka NAPS 2 B Fit.