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  1. #1
    up the dosage eatyourspinach's Avatar
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    High dose of caffeine increase post exercise energy expenditure

    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6903805/

    Does caffeine ingestion before a short-term sprint interval training promote body fat loss?

    Abstract

    We investigated the effect of caffeine ingestion combined with a 2-wk sprint interval training (SIT) on training-induced reductions in body adiposity. Twenty physically-active men ingested either 5 mg/kg of cellulose as a placebo (PLA, n=10) or 5 mg/kg of caffeine (CAF, n=10) 60 min before each SIT session (13×30 s sprint/15 s of rest). Body mass and skinfold thickness were measured pre- and post-training. Energy expenditure was measured at rest, during exercise, and 45 min after exercise in the first SIT session. Body fat was similar between PLA and CAF groups at pre-training (P>0.05). However, there was a significant decrease in body fat after training in the CAF group (−5.9±4.2%, P<0.05) but not in PLA (1.5±8.0%, P>0.05). There was no difference in energy expenditure at rest and during exercise between PLA and CAF groups (P>0.05), but the post-exercise energy expenditure was 18.3±21.4% greater in the CAF than in the PLA group (P<0.05). In conclusion, caffeine ingestion before SIT sessions induced a body fat loss that may be associated with higher post-exercise energy expenditure.


    "The mechanisms by which caffeine speeds up SIT-induced body fat reduction is not fully known and cannot be determined from our experimental design. However, caffeine significantly increased (∼20%) the post-exercise energy expenditure, which is accordance with previous studies showing that caffeine ingestion before moderate-intensity exercise increases post-exercise energy expenditure (8,9). The effect of caffeine on post-exercise energy expenditure may have been larger than what we observed as caffeine half-life is approximately 5 to 6 h (20); therefore, caffeine may have acted to increase energy expenditure beyond 45 min of recovery. In support of this, energy expenditure did not return to basal levels within 45 min of recovery. Assuming that the increase in post-exercise energy expenditure with caffeine remained throughout the six SIT sessions, this may have promoted a negative energy balance leading to a greater body fat loss. However, further studies monitoring post-exercise energy expenditure for longer times (e.g., over 24 h) and after all SIT sessions will be necessary to confirm this hypothesis."

    Makes me wonder if it's caffeine specific or can be applied to the vast variety of stimulants contained in a lot of pre workouts.
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  2. #2
    Hip Drive® DASBUNKER's Avatar
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    how about the effects on a 2.5mg/kg group? maybe it has a similar outcome without that much caff.
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  3. #3
    up the dosage eatyourspinach's Avatar
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    Originally Posted by DASBUNKER View Post
    how about the effects on a 2.5mg/kg group? maybe it has a similar outcome without that much caff.
    generally most reported benefits have come from 3+ https://www.degruyter.com/downloadpd...-2016-0090.pdf, https://jissn.biomedcentral.com/arti.../1550-2783-7-5
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    Registered User koweanguy's Avatar
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    Originally Posted by eatyourspinach View Post
    Thank you for this
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