11:28 a.m. on May 10, 2005 (EDT)
Sore muscles, eh? Well, the only real answer is to get out there and hike the inclines. Then again, there is the expensive answer - get a Stairmaster or a gym membership that has stair climbers and work out every day.
Even though that sounds a bit sarcastic, that really is the answer. You can get some relief from NSAIDS, but you don't really want to depend on pills. Ibuprofen and naproxin are supposed to be most effective of the over the counter NSAIDS for muscle soreness.
What is happening (no, I'm not an MD or physical trainer, just read a lot, and as an Old Greybeard, suffer more and more as I age) is that during exercise, you build up lactic acid in the muscles. You probably are building up most of it during the uphill part of your hike, then start feeling it during the downhill return trip. I personally find that if I go more than a few days without hiking the local hills, I get sore quads, with the soreness peaking the second day, and lasting into the third day. When I was much younger, I could go a week between hill hikes and climbs without getting the soreness, but the exercise requirement has increased with age. If I hike the hills on a daily basis, even a couple miles round trip, I have found I can let my fast-hiker buddy drag me along on one of his 30-mile, 5000 vertical feet in a day treks and get no soreness (just a lot of fatigue).
So you have to really work the quads on a regular, frequent basis (current recommendation seems to be half hour of exercise per day, 5 days a week). Climb the stairs at work instead of taking the elevator. I find bicycling helps with the hiking. Before retiring, I used to commute to work on bike (hey, it was faster than the car most of the places I worked). Even a daily walk around the block.
Another thing that seems to help is a good electrolyte replacement drink (I prefer Bill Gookin's Hydrolyte), and maybe eating some high-potassium food before, during, right after the hike (bananas are a good example).
Also, a good massage of the legs by someone knowledgable helps get the lactic acid out. There are some books available for runners that tell you how to massage your own legs, if you don't have a spouse who is a trained sports masseuse or masseur and, like me, are too cheap to pay a professional. Besides, when you are on a multi-day backpack or climb, you will have to do it yourself.
But in the end, there really is no substitute for regular exercise of those muscles.