The Pumping Iron Extreme Bulking Stack includes three different SARMs that work well in combination to achieve maximum mass gain.
- RAD-140 – 10mg x 60 tablets
- LGD-4033 – 5mg x 60 tablets
- YK-11 – 5mg x 60 tablets
- Enhanced endurance and stamina
- Enhanced vascularity and fullness
- Increased muscle mass
- Rapid gains in strength
- Improve recovery allowing greater training volume
- Prevent muscle catabolism even if in a caloric deficit
LGD-4033 Ligandrol is a SARM (selective androgen receptor modulator) created to increase lean muscle mass and help break strength plateaus for the ultimate body recomposition tool. A SARM is designed to have a similar effect on the body as anabolic steroids but targets the skeletal muscle tissue selectively.
Ligandrol targets anabolic pathways in the body and has been shown in human clinical trials to increase muscle mass and leg strength. Aside from this study, there is plenty of anecdotal evidence from bodybuilders who use LGD-4033 to boost muscle mass and density, as well as significantly improving training performance.
If you’re wanting to gain lean muscle mass and experience increases in strength then Ligandrol is a supplement not to look past. The main active ingredient LGD-4033 is very similar to the popular SARM Ostarine but 12 times more powerful and only a third of the dose.
Like anabolic steroids, there are certain compounds that work better for different physique goals. Ligandrol is best used when looking to bulk with lean mass and assisted with a high-calorie diet for the best gains.
SARMs offer a halfway point between natural muscle builders and testosterone boosters on the one hand and prohormones on the other. We would advise anyone supplementing with SARMs to run a thorough post cycle therapy as you would with a prohormone cycle.
Pumping Iron RAD-140 is a Selective Androgen Receptor Modulator, also known as a SARM. SARMs are a novel class of supplement which exert significant effects in a very short space of time which many former prohormone users are switching over to on account of their more focused action which is targeted to muscle tissue and not on areas like the hairline or skin.
Although studies of RAD140 are currently limited, the evidence that has been gathered is very promising. One study performed on monkeys examined its effect on muscle growth with significant results that showed considerable increases in lean muscle mass after only 28 days.
If you are looking for extreme recomping, strength, and lean muscle mass gains, RAD-140 is one of the best SARMs to choose.
Research has shown that YK-11 inhibits myostatin. It induces muscle cells to make more follistatin which is a strong myostatin inhibitor. Myostatin (also known as growth differentiation factor 8) is a protein produced by muscle cells which acts on muscle cells to inhibit myogenesis. Research through the years shows that when you block myostatin, it allows for significantly more muscle mass.
Initial research by Japanese Researcher, Yuichiro Kanno, in 2011 at Toho University, has shown that YK-11 attaches itself to the androgen receptor and makes muscle cells produce more anabolic factors.
He also discovered that YK-11 induces the muscle cells to produce more follistatin, which decreases myostatin and increases muscle growth through this mechanism, as well. YK-11 selectively binds to the androgen receptors similarly to LGD-4033 and MK-2866. That is to say, that YK-11 offers great promise as a therapy for muscle wasting illnesses and for promoting very massive muscle gains.
Much like MK-2866 and LGD-4033, YK-11 binds to the androgen receptors in muscle, and bone. YK-11 has a weak anabolic to androgenic ratio of greater than 25:1. This means that YK-11 is very weakly androgenic and provides anabolic effects while minimizing the negative effects on the prostate and other organs.
YK-11 appears to be weakly suppressive to the Hypothalamic Pituitary Testicular Axis (HPTA) but far less so than anabolic steroids or prohormones.
YK-11 users have observed no elevations in estrogen, and decreases sex hormone binding globulin (which would result in a raised free testosterone, but not total testosterone). In addition to that, YK-11 is a drier compound than LGD-4033 and is excellent for lean gains on par with testosterone. It produces lean, dry, easily kept gains in strength and muscle, and reductions in body fat.
YK11 is a steroid made by directly altering the chemical structure of DHT. In contrast, all other SARMs have a nonsteroidal structure. YK11 and SARMs work differently in the body and may have different side effects.
YK-11 has a very unique structure which shares more in common with steroids than it does with SARMs.
Because this class of drugs is so new, no established naming convention exists. Based on its activity and chemical structure, it may be more appropriate to call YK11 a synthetic steroid rather than a SARM.