I'm looking for an adjective to describe a forehand shot in tennis that requires a lot of effort (from hard hitter, baseliner, e.g. Thiem, Del Potro...) as opposing to an effortless, elegant forehand shot (e.g. from Roger Federer). I know there're some people who may disagree with my labelling of the tennis players above, but I'm just here to ask for the word. So please bear with me ;)

I've thought of words like physically demanding or demanding, tough... (but they don't sound quite suitable to me); or even effortful (but unfortunately, some dictionaries don't consider it as a correct word).