:/

Is it the Fitness Blender 8 week challenge? If so, I'm doing it too and you can add me as a friend if you like. We can support each other! Even if it's not, feel free to add.

As for the tiredness, are you eating enough to support the amount of exercise you're doing, and are you getting enough sleep? Those are always my first culprits if I start feeling run down.

There's a difference between "poor me I haven't moved in 17 years ouch ouch ouch" and "I may have torn an ACL." Only you can judge what your body is telling you. If you think it's just a matter of motivation lacking due to new soreness, you have to decide whether it's worth it to keep going.

For me, I know what soreness feels like and I know what injury feels like. If I'm too sore, I back off a little bit (don't stop exercising, mind you, but take the intensity down a notch). If it's just laziness on my part I butch through it.

I dislike these "challenges" because it assumes everybody is at the same activity level, even the "beginner" ones or the "you can come from straight off the couch and do this!" Everyone has different physical abilities. If you think you can't handle the challenge, don't do it. Find something else that's more your speed. The idea is to get your body moving and developing strength/endurance. Also, there's nothing wrong with continuing the challenge but just repeating a day or two. When I start C25K back up in January I know I'll have to repeat Week 1 for a month probably.

From personal experience (limited) I can assure you, you are currently in the worst part of the process. Once you get past that 2-3 week "is it really worth it", you will thank yourself for pushing through.

Nothing worth doing is ever easy, it's the strong one's that survive!

As others have stated, make sure your eating right, TON's of water, and get your rest. It's a balancing act, so make sure you have all the pieces fitting together correctly.

Now get to it!

Believe me I know what your going through. I was on it for about a month and lost steam. Joined a weight loss challenge/group recently and finally got back on it for a couple weeks and lost steam this week. But I am determined to start fresh again Monday morning and keep with it! You got this! Feel free to add if you want to!! And yes calorie in take is important. I tried it on the dreaded 1200 goal they give you and it wasn't happening. I now do 1400.

The soreness goes away eventually. Takes a few weeks, but you'll start to notice things getting easier and you not waking up with a sore body the next day. Eventually you'll almost miss the sore feeling of knowing you worked hard. Then you'll push to the next level. I did T25 and it was brutal at first. By the end I was a champ. You'll learn that once that initial "I have to stop it's too hard" burn, your body gets into it and you start to feel good.