Went out this morning, 1st run since my last Parkrun 12 days ago - have been really busy with work and home since then. At the start my right leg hurt but it went off after a few minutes. At 2.4k the pain came back, in my groin, top of the quads, then spread down the leg. Soon it felt like I was running with a dead leg, so I stopped just short of 4k. Disappointing. Has anyone had a similar experience?