Supplement manufacturers now create various stimulant-free (stim-free) products, which are formulated without caffeine and other common compounds used to raise your metabolism.
Instead, they contain a potent blend of active substances that promote vasodilation by producing more nitric oxide, including scientifically-researched and patented ingredients like GlycerSize™, and substances like citrulline malate (or L-citrulline), L-arginine and grape seed extract.
Boost blood flow
This effect helps to get more blood to working muscles, which increases muscle pumps and enhances endurance and power by delivering more performance-enhancing ingredients contained in pre-workouts, like glucose, creatine, N-acetyl-L-cysteine and Betaine Anhydrous.
Other common performance-enhancing ingredient include amino acids. For example, glycine helps to enhance peak power production and reduce lactate build-up during repeated, high-intensity exercise when taken up to 90 minutes before training, according to one study.
Get a brain boost
And taurine, L-tyrosine and L-theanine help to produce neurotransmitters like dopamine, serotonin and GABA, which reduce stress and are linked with enhanced mood. These amino acids also improve energy production, along with B-vitamins.
And many stim-free products now contain powerful nootropics such as Alpha GPC and Huperzine A to enhance alertness, focus and concentration for that mental edge during workouts.
Without the impact on your nervous system, you can use stim-free pre-workout products in the late afternoon or early evening to maximise your workout intensity, without jeopardising your sleep quality or experiencing any jitters.
And stim-free products are the ideal option for those who use pre-workout regularly and want to cycle their use of stimulant-based products.
Author: Pedro van Gaalen
When he’s not writing about sport or health and fitness, Pedro is probably out training for his next marathon or ultra-marathon. He’s worked as a fitness professional and as a marketing and comms expert. He now combines his passions in his role as managing editor at Fitness magazine.