Yaxo is correct. Creatine would be the best supplement in terms of gaining towards strength and it does push water into the muscle. However, definitely do your research on creatine, there’s quite a few brands, and not all of them are reputable and/or created equal. Also, with creatine, it requires a ‘loading phase’, where you would probably would have to take it a minimum of at least a week before you probably would see any affects in terms of progress of strength. Keep in mind, if you start to feel any effects from the creatine from bloating, severe water retention or any intestinal issues, definitely stop using it. Oh, and you definitely want to make sure you’re drinking copious amounts of water when taking creatine, as it takes your water store and uses it towards the muscle, which can ultimately dehydrate you if you’re not consuming enough liquids.
Regardless, if you want strength, that comes from food. Supplements will only help you so much, and for some people, supplements do nothing at all, because you your body has to be able to actually react to the supplements you’re taking. But if you’re eating 4/5 meals a day with high protein, and a mix of carbohydrates, you will get stronger, because your body needs the food to push/pull the weight. I don’t care if you take all the supplements in the world, if you’re not eating enough calories throughout the day to push weights, (especially if they’re heavier weights), you won’t have the energy and the strength needed to be moving forward. Food is key at the end of the day.
Also, Conutz makes make a valid point above, Which is stretching. It’s important to pre-stretch to an extent, but you don’t want to overstretch, because the point of stretching is to elongate the muscle, but then you shorten it when you strength train. In my opinion, the most important type of stretching is actually ‘post’ stretching after a work out. Anytime I’m doing shoulders, back, chest, I constantly keep stretching with a light resistance band in between sets, to keep everything fluid and mobile.
There’s this one female in the gym that I see once in a while, she’s incredibly strong for her size, where she can push six plates on the leg press/squats 4 plates, and she maybe weighs 120 pounds with a competitor like body-type, but I’m blown away that she never pre-stretches or post stretches for her workouts. Even though she’s younger and has incredible genetics, I still think she poses herself for injuries. It just blows my mind that when you take athletes who have such great form, and have knowledge in the gym with great lifting technique’s, but they are either completely ignorant or don’t care to stretch for whatever reason. I see this a lot of with quite a few lifters.