Best SARMs for CrossFit (Top 3 Options & Dosage Guideline)

The levels of strength and intensity required from cross-fitters are just crazy. Cross-fit is actually one of the most high-intensity training I’ve ever seen. It’s no wonder the training attracts some of the most competitive athletes out there.

And the one thing we all know about athletes is they’ll always want to get that extra competitive edge. If that’s what you’re looking for, then SARMs might just be the product you want to add to your arsenal.

But that brings the next question. What are the best SARMs for cross-fitting? 

You see, we have several SARMs on the market, and they all affect the body in different ways. Picking the right product for the specific results you want is essential. In this case, you’ll be looking for SARMs that can give you strength gains and endurance. 

This review will provide exactly that. But before we get in-depth, let me give you a quick summary and the key takeaways.

Best SARMs for Crossfit TL;DR

  • The best SARM for CrossFit is Ostarine because it boosts energy, strength, and endurance. It’s also very beginner-friendly.
  • The other two good SARMs for cross-fitters are Testolone and Cardarine.
  • The best place to buy SARMs for CrossFit is from this vendor. I recommend them because they conduct third-party lab testing, have reasonable prices, and have excellent user reviews online. 
  • While buying SARMs for CrossFit, remember that they are banned. Therefore, I wouldn’t recommend using these products when competing in an official, regulated CrossFit event, as they can get you banned for several years.

Let’s now get into the nitty-gritty details.

Best SARMs for CrossFit

Here are the top three Selective Androgen Receptor Modulators for CrossFit.

1. Ostarine MK2866

Ostarine is the best SARM for CrossFit for several reasons. First, this androgen receptor modulator targets specific androgen receptors in your bone and muscle tissues, resulting in increased bone and muscle strength.

Moreover, Ostarine can promote protein synthesis to boost lean muscle growth while encouraging the body to burn excess body fat for energy. This is a good combo, and it’s one of the reasons why Ostarine is also used for body recomposition.

How does that help you as a cross-fitter, though?

It helps by increasing your power-to-bodyweight ratio. And when you factor in increased lean muscle mass and bone strength, Ostarine has the potential to take your CrossFit performance to a whole new level. 

Some athletes also take things up a notch by stacking it with another SARM, Cardarine, which we’ll also discuss.


Those are the direct benefits of how Ostarine will help you out. Let me tell you about the other benefits that make Ostarine one of my favorite SARMs. 

Ostarine is mild. It’s one of those performance-enhancing drugs you can use without losing sleep at night due to the fear of severe side effects. In fact, the SARM is so mild that even women can use it for weight loss and other bodybuilding purposes.


It also comes highly recommended to beginners. So, if it’s your first time taking SARMs, you’ll find Ostarine very inviting.

Don’t mistake that to mean it’s all roses, though. Some users are known to react to Ostarine. So let’s go ahead and discuss the potential side effects.

Potential Ostarine side effects

Headaches and stomachaches are the most common side effects of Ostarine. Sometimes, these side effects occur if you’re using the drug in high doses. In such events, regulating the dosage downwards would do the trick to resolve the issue.

At other times, the side effects will simply be due to your body reacting negatively to the SARM. The best approach in such a situation is to abandon the SARM altogether and try another option. You can check out the Cardarine review below, for example.

Besides the two issues, Ostarine also causes testosterone suppression. This is an issue with all SARMs, though, and not just Ostarine. But it can be rectified through a SARMs PCT cycle. 

Lastly, Ostarine causes liver toxicity issues, as reported by the National Institute of Health. This is typically due to their misuse. 

So, let’s look at how some athletes try using Ostarine safely to avoid these negative side effects.

How to use Ostarine for CrossFit

15mg to 20mg per day for 6-8 weeks is the ideal starting dosage of Ostarine. Most users have found this to be the sweet spot where they can get the most benefits from Ostarine without any adverse effects.

If this is your first time using SARMs, I recommend starting with just 10mg per day and gradually adjusting your dosage upwards. That will allow your body to get accustomed to the compound.

As for the cycles, 6 to 8 weeks is the most common. Some users stretch it to up to 10 weeks, though. I wouldn’t recommend doing that unless you have extensive experience using SARMs.

Either way, SARMs should never be used indefinitely. Make sure to take a break after each cycle and run a post-cycle therapy to help your body recover. 

The only thing as important as taking the correct dosages is making sure you’re also buying your SARMs from the right vendor. This is essential to ensure you’re not using any contaminated compounds that could lead to severe side effects or zero results.

So make sure you’re buying from reputable vendors with a track record of delivering quality products. Here is a link to a recommended vendor.

2. Testolone RAD 140

Next on our list of the best SARMs for cross-fitters is Testolone. Also, this is the SARM Rick Gerard tested positive for back in 2017.

I’d say this SARM is the crazier version of Ostarine. 

It’s just like Ostarine, but you get more of everything. So, more strength, more endurance, and more lean muscle tissue. 

That may sound like a good thing, but it’s not that straightforward. Testolone is way more powerful, with intense anabolic effects, which means not everyone can stomach it. The risk of side effects is also higher. 

It’s also not the most welcoming SARM for first-time SARM users. 

So, what does all this mean? I’ve placed Testolone in the second position because although it can significantly help you in Cross Fit, you’ll need to be very cautious when using it to avoid severe adverse effects.

Also, if you have vast experience using SARMs, taking Testolone RAD140 shouldn’t be an issue. 

Potential Testolone side effects

Besides headaches, stomachache, and liver injury, Testolone may also increase your aggression. Keep an eye on this to ensure it doesn’t mess up with your social life.

How to use Testolone for CrossFit

You can start with as low as 5mg per day for 8 weeks when using Testolone for CrossFit. Experienced users are known to take up to 20mg, though. But as said earlier, Testolone can be extremely powerful, so I’d avoid those high doses.

Make sure to take a break and go through PCT after each SARMs cycle.

3. Cardarine GW501516

Last on the list is an interesting PED called Cardarine. 

Fun fact: Cardarine is usually sold and discussed alongside other SARMs but it’s not one. 

SARMs work by targeting androgen receptors in bone and muscle tissues to improve bone density and muscle growth. Cardarine doesn’t do that. It targets PPAR receptors, and that’s why it is called a PPAR agonist.

That simply means that Cardarine acts on the PPAR receptors to trigger several processes, two of which can benefit cross-fitters.

  • Cardarine increases your muscle’s oxidative capacity, resulting in higher endurance. 
  • Secondly, it switches your body’s energy source from glucose to fat, resulting in fat loss and increased energy levels. 

Therefore, if you’re looking for something that can enhance your athletic performance but don’t want to use a typical SARM, Cardarine is a great alternative to try.


As shown above, GW501516 can be really helpful, but it also has potential side effects. Let’s discuss that next.

Potential Cardarine side effects

Cardarine may not be a SARM, but it is not free of side effects. The compound has been linked to cases of stomach cramps and liver toxicity.

One thing to note here is that Cardarine will not cause testosterone suppression, the same way all other SARMs do. Remember, it’s not really a SARM, and it’s also non-hormonal, so it won’t tamper with natural testosterone production.

How to use Cardarine for CrossFit

Cardarine can be used in dosages of between 10 and 25mg per day for 8 to 12 weeks. Start with a low dosage and short cycle, then increase your dosage as you get comfortable with the compound.

Cardarine may not cause suppression, but it’s essential that you take breaks between cycles. This will be instrumental in preventing unwanted side effects. 

As always, remember to buy your products from reputable vendors to ensure you’re taking pure SARMs.

Best SARMs for CrossFitters FAQs

1. Are SARMs allowed in CrossFit?

No, SARMs are not allowed in CrossFit, especially if it’s a regulated competition. SARMs are known to boost athletes’ performance, giving users an unfair advantage over others. 
And before you ask, yes, regulation bodies can test for and detect SARMs from your system. I have a detailed article on SARM drug tests that you can check out for more details on this.

2. Is Ostarine good for CrossFit?

Yes, Ostarine is good for Cross Fit because it boosts muscle strength and endurance. This would allow you to perform at your highest level as you engage in the different high-intensity functional movements CrossFit demands.
Another thing that makes Ostarine good for CrossFit is its mild nature. Compared to other SARMs, Ostarine is quite mild, which allows users to enjoy its pros without putting themselves at too much risk. 
That’s why Ostarine is also considered a good SARM for beginners and even women.

In Closing: Best SARMs Crossfit?

To sum up, Testolone (RAD140), Ostarine (MK2866), and Cardarine (GW501516) are the best SARMs for CrossFit. These specific SARMs are my top picks because they are shown to boost strength, stamina, and endurance—the things you need to perform well in CrossFit.

And while the above SARMs are generally safer than anabolic steroids, it’s essential that you use them correctly and buy them from reputable vendors to avoid unnecessary complications.

That said, you should keep in mind that the products are not allowed in CrossFit. Therefore, avoid using them if you’re a professional athlete about to engage in a regulated CrossFit competition. The advantage these research chemicals will give you is just too much, so sports regulation bodies don’t allow them.


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