Ski
A good ski fitness program targets exactly what the first week on the slopes brutally reveals: thighs burning by the second run and knees that simply don't hold up well.
Ski Prep specifically builds the isometric leg strength and core stability genuinely needed for skiing and snowboarding over 8 full weeks at three sessions a week, with specific dedicated knee strengthening work to limit the sprains and aches so common on the ski slopes. The program always finishes just before your ski holiday starts, not during it.
Always start a full eight complete weeks before you actually leave so you genuinely arrive fit from the very first lift ride, without spending the first two days on the slopes in pain.