We make a performance enhancing device.
With the goal of enhancing strength and endurance recovery between sets or on rest intervals. Attempting to use cold and heat as efficiently and practically as possible.
To accomplish this efficiency and practicality, we take a unique approach that may surprise you. Check out these 9 scientific concepts on why we make and use our All Natural PED recovery sleeves the way we do.
A case for the non-obvious
1-Optimising heat transfer via the palms and soles
We optimize heat transfer via the the palms of your hands and the soles of your feet. 
Because you give off the majority of your heat at your extremities. The palms and soles contain an abundance of additional capillaries that you use to remove heat from your body.
Specifically targeting and manipulating these areas can lead to an increased efficiency in removing heat from the body. Which can help enhance performance and recovery.
2-Increasing carbon dioxide with negative pressure compression
We want to increase your carbon dioxide levels on your arms and legs with our negative pressure compression sleeves.
Because carbon dioxide acts as the most powerful heat transferring agent in our bodies. This improves the transfer of heat from deep with in our body and muscles to the skin’s surface for removal from the body.
Additionally, carbon dioxide plays a key role in delivering oxygen to your muscles. Drowning your muscles with oxygen sounds like a great idea to enhance recovery and performance, but you need carbon dioxide to bind the oxygen molecules to the muscular cells. Increases in oxygen go to waste without carbon dioxide.
Thus increasing carbon dioxide levels to remove heat and increase oxygen delivery to your muscles becomes a primary goal in enhancing performance and recovery.
3-Improving heat transfer with a negative pressure generator
With our negative pressure generator, we want to pull your blood and capillaries towards the palms and soles.
Because when applying cold to the palms and soles, we want to enhance your ability to remove heat by preventing the constricting of blood vessels that typically occurs when applying temperatures between 45-65 degrees °F.
Keeping these blood vessels open ensures an enhanced removal of heat. By bringing more capillaries to the surface and enhancing heat transfer during your cold session.
4-Improving heat transfer with heat
We use heat to open or re-open the blood vessels in your palms and soles. You do this by applying heat periodically in between your cold sessions. Which will help stimulate blood flow to the palms and soles.
Because heat will prevent the constricting of blood vessels after applying cold to the target area. Or it will re-open constricted blood vessels and allow future cold sessions to actually work in removing heat. If you experience closed blood vessels you will shunt blood from the palms and soles and your cold session will prove ineffective in removing heat. Therefore, you apply heat to the off-hand not using the cold therapy.
The additional benefit, heat will increase blood flow to the palms and soles. Which will get the palms and soles ready for your next cold session exposure.
While the use of heat may prove beneficial. You want to use it strategically. The restriction of blood flow to the extremities may begin as early as 86°F (30°C) when at normal body temperature, 98.6°F (37°C).  Therefore focus on using heat early in sets, on isolation exercises and in cooler environments that suppress body temperature.
Meanwhile, the risk of restricting blood flow to the extremities significantly decreases with an elevated body temperature, 99.5°F (37.5°C).  Therefore, you should wait to apply cold until after your first set. As exposure to 50°F (10°C) causes very little restriction of blood flow with an increased body temperature. Making cooling more effective after a raised body temperature.
5-Using cold and heat to alter your pain sensations
While improving heat transfer remains a main focus. Our other main focus, altering your sensitivity to pain.
Because by manipulating your sensitivity to pain, you can trick your body into doing more than normal. A strength hack that blunts the sensation of pain in your arms and legs while they give feedback to your brain. This allows for enhanced strength recovery gains that you would not normally experience.
6-Enhancing perceptual recovery
While we strive to make a device that improves physiological recovery. The impact of perceptual recovery might reign supreme.
Because the use of the mind in enhancing your performance and recovery remains and underutilized, but incredibly important tool. We attempt to use the belief effect. And we want to create a feel good positive association when using our product. This positive experience will lead to gains in performance and recovery.
The use of a cold recovery modality between exercise sets provides relief. While the negative pressure provides a noticeable pressure on your arms and legs. These perceptual cues when combined with their physiological changes will lead to enhanced recovery and performance because of the belief effect its positive associations that you now know about.
7-Localized cooling based on type of exercise
A simple concept. Base your recovery modality on the type of exercise you will perform.
Because you want to maximize your cold recovery while also altering your pain thresholds. Endurance athletes and recovery on leg workouts should take place via the soles. While upper body exercise recovery should take place via the palms. 
A case for and against the obvious
Continuous cooling sounds like a great idea for endurance athletes that participate in sustained physical activity greater than 30 minutes. However, the practicality of cooling the legs while running becomes a major obstacle. Cyclist could make it work and may find it beneficial.
However, due to the questionable performance gains experienced with continuous cooling. It may not provide an additional benefit over a single cooling bout. 
Meanwhile, continuous cooling during weight training seems unnecessary due to the lack of time under tension. Your work to rest ratio between sets will heavily favor rest in the majority of instances. The fact that we use recovery through the palms (grip) and soles (pushing off the ground) removes almost all of the practicality of continuous cooling during weight training.
Additionally, we could make variants in the future to provide continuous cooling, but the extra supplies, cost of applying continuous cooling and lack of scientific support currently acts as a major deterrent.
9-Direct muscle cooling
Direct muscle cooling also sounds good in theory. However, applying a cold source to the outer muscles tends to cool the surface of the muscles, but seems unable to penetrate deep inside the muscles to provide enough benefit.
If however, you were to use a cold water immersion technique, you would adequately cool the whole muscle. However, this may appear to over cool the muscles leading to decreased force and performance. While the practicality of using cold water immersion techniques during your workouts remains difficult.
Additionally, we could in the future add surface cooling directly over the muscles to our current product, but the extra supplies required and cost of applying direct muscle cooling when combined with lack of scientific support currently acts as a major deterrent.
The end result – We invented these All Natural PED recovery sleeves
We make intermittent negative pressure compression sleeves. These sleeves turn into static compression when used in sweaty conditions.
We use these negative pressure sleeves with reusable cold packs and fifty cent, double use heat packs. This aids heat transfer through the palms of your hands and soles of your feet. As we attempt to use cold and heat as conveniently and practically as possible.
We strive to increase your strength endurance by helping you recover between your sets or on your rest intervals. Allowing you to increase your volume of work by improving your strength recovery.
The means to accelerate strength recovery occurs through increasing heat transfer, altering your pain threshold and utilizing the belief effect. This recovery concoction, our All Natural PED recovery sleeves, an example of how the whole is greater than the sum of its parts.
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1-Cotter, James D.; Taylor, Nigel A. S. “The distribution of cutaneous sudomotor and alliesthesial thermosensitivity in mildly heat-stressed humans: an open-loop approach.” J Physiol 565.1 (2005) pp 335–345. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/15760945 | Full text: https://www.researchgate.net/publication/7973410_The_distribution_of_cutaneous_sudomotor_and_alliesthesial_thermosensitivity_in_mildly_heat-stressed_humans_An_open-loop_approach
2-Khomenok, Gennadi A.; Hadid, Amir; Preiss-Bloom, Orahn; Yanovich, Ran; Erlich, Tomer; Ron-Tal, Osnat; Peled, Amir; Epstein, Yoram; and Moran, Daniel S. “Hand immersion in cold water alleviating physiological strain and increasing tolerance to uncompensable heat stress.” Eur J Appl Physiol (2008) 104:303–309. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/18478254
3-House, J.R.; Lunt, H.; Magness, A. and Lyons, J. “Testing the Effectiveness of Techniques For Reducing Heat Strain In Royal Navy Nuclear, Biological And Chemical Cleansing Stations’ Teams.” J Royal Naval Medical Service 2003, 89.1 27-34. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/14655424 | Full text: https://www.researchgate.net/publication/8977145_Testing_the_effectiveness_of_techniques_for_reducing_heat_strain_in_Royal_Navy_nuclear_biological_and_chemical_cleansing_stations’_teams
4-Goosey-Tolfrey, Victoria; Swainson, Michelle; Boyd, Craig; Atkinson, Greg; Tolfrey, Keith. “The effectiveness of hand cooling at reducing exercise-induced hyperthermia and improving distance-race performance in wheelchair and able-bodied athletes.” J Appl Physiol 105: 37–43, 2008. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/18436695 | Full text: https://www.researchgate.net/publication/5415598_The_effectiveness_of_hand_cooling_at_reducing_exercise-induced_hyperthermia_and_improving_distance-race_performance_in_wheelchair_and_able-bodied_athletes
5-Kwon YS, Robergs RA, Kravitz LR, Gurney BA, Mermier CM, Schneider SM. “Palm cooling delays fatigue during high-intensity bench press exercise.” Med Sci Sports Exerc. 2010 Aug;42(8):1557-65. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/20139781 | Full text: https://www.researchgate.net/publication/41414289_Palm_Cooling_Delays_Fatigue_during_High-Intensity_Bench_Press_Exercise
6-Tyler, Christopher James; Sunderland, Caroline. “Neck Cooling and Running Performance in the Heat: Single versus Repeated Application”. Med Sci Sports Exerc. 2011 Dec;43(12):2388-95. Abstract: http://www.ncbi.nlm.nih.gov/pubmed/21606877 | Full text: https://www.researchgate.net/publication/51160327_Neck_cooling_and_running_performance_in_the_heat_single_versus_repeated_application
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