The Next Week
The day after your race should be devoted to rest or light activity. You will probably find that extra stretching is beneficial. A hot bath in Epsom salts will get some of the soreness out of your legs.
Remember, even in your training, you never did all three sports in the same day, certainly not compacted into a couple of hours. Chances are your heart rate was at its highest for the longest period ever in your life. You stressed your body like never before, so you need time to recover.
You will recall from your training that every week had time set aside for recovery, and there were recovery weeks of lighter-than-normal activity. You need that recovery time just as much, if not more, after your race.
If your triathlon was on a Sunday, keep the exercise light for at least Monday and Tuesday. Acceptable activities are stretching, yoga, easy swimming, and light biking. Avoid running, even slowly, until Wednesday. Keep the heart rate low.
Brakes, Please
If your race went well, you might be feeling superhuman, ready to leap tall buildings or run a 10K at full speed. If so, you are an injury waiting to happen. Many a new athlete has suffered a devastating injury by overdoing it in the euphoria of success after the first venture into sports. Think long term. Give your body a break.
If you just have to get out on the road, go for a ride, but keep your bicycle in an easy gear. No elevated heart rates or hard riding. An easy ride can actually take some of the soreness out of your legs, and you can get the same benefit from an easy swim.
It's different if your goal in your first triathlon was just to finish and you did not push particularly hard. In that case, your recovery time will be shorter. You should still exercise caution, however. The triathlon was a new experience for your body. If you want it to be healthy and ready for the next attempt, use common sense.
You will have some soreness for a couple of days after the triathlon, no matter how easy, relatively speaking, your effort was. That's normal. If fatigue lasts for more than a day or two, that may be a sign that you need more rest. Some people recover more quickly than others. As you gain more experience, you will learn to read your body regarding its limits and recuperative abilities. In the meantime, it will be wise to be conservative.
If any workout after your race seems more difficult than usual, bag it for the day. The same symptoms that signal overtraining can also indicate a less-than-full recovery from your triathlon.
A day or two after your triathlon, consider treating yourself to a full-body massage. Besides feeling good, a massage promotes recovery and helps rid your body of the lactic acid that accumulated during your race. Make a postrace massage part of your triathlon plan.
By the third day after your race, it's okay to start running again if you are so inclined, but keep it easy. If you just have to push a little, go at a moderate pace. No hard stuff, period.
Of the three sports, running is the most likely to result in injury if you go too hard too soon after the triathlon. Be aware of tweaks and pains once you start running again. If something hurts, slow down or stop. You won't be able to do that next race if you end up sidelined for weeks with a hamstring pull, sore Achilles tendon, or worse.
Back to Normal
On race day, you had to eat a bit extra to replenish glycogen stores. You can resume normal eating the day after the race, always mindful of your different nutritional needs when training. As always, think carbs, protein, and plenty of fluids, and go easy on saturated fat.
Try to get back into your prerace sleeping regimen (eight hours or whatever works for you). Your body does a wonderful job of repairing itself and getting ready for the next challenge, and a lot of that self-healing occurs during rest.
You are now a triathlete with a new view of the sport, excited at the prospect of achieving more as you recover and plan your next race. The key is not to let the exhilaration of finishing a triathlon cloud your judgment when it comes to resuming your activities.

