How tired should I be after a workout?

The point of working out is to either use more or equal to the amount of energy you put into your body via food. So naturally, you're going feel a little tried after decent workouts. Despite this, you generally don't feel tired directly after the workout, but 3-4 hours later.

If you're feeling tired straight after then I can think of 3 possible problems.

1. Diet it insufficient for the level of workout you're doing, OR you've recently changed your diet significantly. I am not familiar with the P90X workout so I don't know what it entails but does it involve any form of dieting?

2. Insufficient sleep. People often don't know that they're not getting enough sleep until they really actually do something. It's just like going to school in the morning without breakfast. (P.S, eat breakfast, it will help a lot in all aspects of your programs ), often it wont be until you really kick start your metabolism that you'll notice any lack of sleep signs. Are you getting 7.5-8 hours most nights?

3. Definitely the most likely option, insufficient warmup and warmdown.

When you exercise, especially when you first start a new program; you can get something called an oxygen debt, which is when your body has moved beyond the aerobic energy system and into the lactic acid system(This isn't a bad thing, and it unavoidable in many workouts) and the muscles that you're really using starve the the rest of the body of oxygen, or can't even get enough for themselves.

After a workout, warming down (which is a progressively decreasing intensity cardio/dynamic workout) acts to keep your muscles warm and active but the intensity low so you're still in the aerobic system, which means you have surpluss oxygen which can be used to repay your debt.

The reason you need to warmdown is during exercise, vaso-constriction/dilation occurs in your body which means the blood supply to certain muscles/organs is changed to suit your workout. The blood vessels take considerable time to return to noraml without a good warm-down, which will lead to you're entire body feeling weak and tired.

In summary, your workout might include a warm-down, but if you're new to it or unfit then you might need to do more.

The warm-down will precent sore muscles the next day, reduce fatigue, maintain a higher metabolism and promote more bloodflow.

 

basic rule of exercise.

The more you use a muscle the more it can be used.

You said your a beginner so its natural to worn out after a workout, you to be sore the next day.

Be sure and take a day or two off if your really hurting, give your body time to heal itself.

You can help your body repair the damage caused by a workout by drinking water and a lot of it. Eat plenty of protein this help your body repair muscles.

 

Just wait until you get to plyometrics, then you'll really be tired.

 

I suggest you be careful just starting out running a mile. First off running a mile is a bit much for your body starting out. Also greatly depends on your body size. If you're thin then you might be okay, but if you're average or a bit more than average, a mile running is going to be a bit much but if you feel energetic then I suppose you're okay. Me I've been doing this Couch to 5K plan that I found recently and it's been paying off. I've been also doing 2.5 miles a day (however this is broken up into 8 minutes total of walking, and 12 minutes of jogging. And it's basically 1 1/2 minutes of jogging followed by a minute of walking for a total of 20 minutes. Turns out most studies show that no more than 20-30 minutes, three times a week is the optimum fitness. Generally those who do it daily and such are doing it for more than fitness). So just be careful, unless you're seriously overweight, I would say that you can probably not do the mile daily...but since a mile is generally 10 minutes of jogging, you could possibly upgrade to 20 minutes or keep the 1 mile per day. Just look up the Couch to 5K running plan and look for "Cool Running" because I've found it's been helping a lot plus I've stuck to it because it's structured and you're able to pace yourself and don't have to follow it completely to the T.

But it's just a suggestion, just be careful. Remember, doing too much will cause you pain, and that pain could just make you quit. It's why sooooooo many people stop working out, because they push themselves too hard and as a result wind up in too much pain and exhaustion, which just makes them give up. Just remember that less is more

 

I've seen the infomercials for that isn't it supposed to beat the shit out of you? "Muscle Confusion" as that guy says about 100,000,000 times lol

 

PX90 is an advanced workout. And while it's a good workout, you can't cram a lifetime worth of exercise into 1 day.

It might be a good idea to set the PX90 aside for a while and work on basic cardiovascular fitness- run, bike, treadmill and core fitness. When you can do a basic workout without exhaustion, then come back to PX90 and focus on the plan. Otherwise, you're likely to get discouraged and quit- and that won't accomplish what you've set out to do.