I'm doing StrongLifts 5x5. I hit gym in the night hours and this is the situation:
BW: 64kgs Saturday: Rest Sun: 6km walk Mon: Squat 75kg 3sets of 5 reps, Bench 42.5kg 5x5, Barbell Row 42.5kg 5x5 Tue (yesterday): 6km walk + 20min session of dynamic stretching. Wed (tonight, 7hrs from now): Squat 75kg 5x5, OHP 31kg 5x5, Deadlift 90kg 1x5
I usually sit in front of computer for the entire day, so I wanted to do walking and a bit of stretching on rest days. I heard that it helps in recovery too. I started walking on Sunday and I didn't have any problem for next day's workout.
On Monday's workout, fearing injury, I only did 3 sets of squats that day as I felt my squat form wasn't good. Yesterday my back & upper body was little sore. So I added a 20 min session of dynamic stretching to my yesterday evening's 6 km walk. Since waking up this morning, my lower back is very sore. It is as if I did a heavy workout. I don't understand why this happened. This wasn't as sore yesterday. I thought walking & stretching would only help me in recovering.
- Why did this happen? Do I need to change anything?
- What should I do about today's workout? Squatting 75kg 5x5 and then Deadlifting 90kg is definitely not going to go easy on my lower back.