This week's challenge is simple: get in two strength sessions on top of your running. Strength work is the part of the plan most runners skip. It's also what helps you hold your form late in a race, especially on hills and in the back half of an ultra. 🟢 Beginner: Two 15-minute sessions. Bodyweight squats, lunges, glute bridges, calf raises, and a plank. Focus on clean form, not reps. 🔴 Advanced: Two 30-minute sessions. Add single-leg work like step-ups and single-leg deadlifts, plus core. ⛰️ Ultra and mountain runners: Prioritize step-ups and calf raises. Your climbs will thank you. Schedule them on easy days or after an easy run, not right before a hard workout or long run. If something hurts, back off. Every plan in the Classroom has strength sessions built in, so use those if you're following one. Comment "I'm in" below, and check back this weekend to tell me how it went.