This is a common reaction to a recent adoption of a workout plan. Were I you, I would take a lot of time off between workouts in the beginning until you acclimate to it.

You may want to also look into an HST-type workout. To save you some time, you basically just do 2 sets of whatever exercise you want to get better at 3x a week. So for me I wanted to get better at chinups so I started at 2 sets of 6 chinups (I think my max was 8 in the beginning, don't do your max for each set) 3x a week and now I do 2 sets of 13 3x a week. You want to increase the weight or reps or something each workout or at least each week. The strain per workout is greatly diminished and the overall efficacy of your workouts is massively increased. You will see great results. You could do a total body workout, but I just choose which movements I want to strengthen and work on those. Some movements are worthless, so I skip them.

The odds of injury or overtraining on a correctly-managed HST workout plan are practically nil. It's efficient and fun. Just resist the temptation to do a million sets. 2 sets of slightly sub-maximal reps. Good luck.

Ditto on BCCAs. it'll take 5-10 days to recover. Part of taking time off, part of getting older (sorry). I'd eat half a sweet potato before and half after workouts as well. Be sure to eat protein before and after as well (more so after). Stay hydrated, eat a banana before bend. And do range of motion stretching. Myofascial release if you know how or have someone to help.

GNBN:

Bad News, 7 months is more than enough time to lose some capability and conditioning.

Good News, if you have ever had the conditioning withing a few years back, you will find it easier to regain it that it was to earn it in the first place.

http://www.bodyrecomposition.com/training/returning-to-training-after-a-layoff-qa.html

In other related news, I have found NAC N-Acetyl-cystine at about 600mg a day to be a fantastic ache and weakness reliever, and it seems to sped strength recovery, not just kill soreness.

Always watch out with doing a new lower body exercise for the first time (first time in seven months, same thing).

First time I did squats or a deadlift, I had the same problem. Now I know to take it easy on intensity in the first workout or two, so I don't totally destroy myself with delayed onset muscle soreness.

You might consider adding starchy tubers. I've found they significantly enhance my recovery.

Workout recovery can be greatly aided by the use of L-Glutamine (5-10 grams/day) as well as branch chain amino acids (BCAA for short - same dose). These amino acids are crucial for muscle growth and repair.

Additionally, research has shown that antioxidant supplementation before and after intense workouts can aid the recovery process. I recommend 3 grams of vitamin C daily.

It may be of benefit to have a Spectracell (spectracell.com) vitamin and mineral analysis performed.

I would say all of the above answers (e.g. BCAAs, L-Glut, starchy tubers) may be a bit overkill with where you are in your fitness and training. I would say the main problem is you took 7 months off and then made your body move in ways it is not used to. This will result in soreness. Take time between workouts. Stretch daily. Foam, or better yet, pvc roll. Continue to workout and add in a variety of moves. Once you are able to train at a higher level, consider the more sophisticated recovery methods mentioned above. Best wishes on your smart decision to start your workout regime again.

I too have had ongoing issues with intermittent excessive post exercise muscle soreness.

I also have intermittent post exercise malaise; e.g., 2-to-4 hrs post exercise, I sometimes have flu-like achiness (physical & mental) for 4 to 6 hours, with poor and unproductive sleep.

Two things help for me: (1) BCAAs & (2) fasting.

I take the BCAAs post exercise and believe they help with recovery; sometimes I add then to unflavored whey protein as well.

I do a keto-fast every Sat (FriPM-to-SunAM, 36 hrs); complete carb & protein restriction, and I eat coconut oil (6 tbs min), heavy cream, and ghee for energy.

I also do a very hard interval workout SatAM (swimming or running), and my recovery while fasting is always incredible. I can't explain exactly why this is, but I believe the introduction of carbs for me inhibits exercise recovery.

(I'd welcome reader comment/feedback if you have ideas!!)

I've heard cherries can reduce muscle soreness.

As a San Diego personal trainer, most of my clients starting out experience muscle soreness due to their lack of exercise prior to training with me. Here is a great blog I wrote that explains how to help prevent and speed up the process of muscle soreness post workout.