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The effects of supplementation with P-Synephrine alone and in combination with caffeine on resistance exercise performance

Overview of attention for article published in Journal of the International Society of Sports Nutrition, September 2015
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (93rd percentile)

Mentioned by

news
1 news outlet
blogs
1 blog
twitter
10 tweeters
facebook
2 Facebook pages
reddit
2 Redditors
video
1 video uploader

Citations

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16 Dimensions

Readers on

mendeley
115 Mendeley
Title
The effects of supplementation with P-Synephrine alone and in combination with caffeine on resistance exercise performance
Published in
Journal of the International Society of Sports Nutrition, September 2015
DOI 10.1186/s12970-015-0096-5
Pubmed ID
Authors

Nicholas A. Ratamess, Jill A. Bush, Jie Kang, William J. Kraemer, Sidney J. Stohs, Vincenzo G. Nocera, Megan D. Leise, Keith B. Diamond, Avery D. Faigenbaum

Abstract

Little is known concerning the potential ergogenic effects of p-synephrine supplementation. Therefore, the purpose of the present study was to examine the effects of supplementation with p-synephrine alone and in combination with caffeine on free-weight resistance exercise performance. Twelve healthy, college-aged men performed a control (CT) resistance exercise protocol consisting of 6 sets of squats for up to 10 repetitions per set using 80 % of their one repetition-maximum (1RM) with 2 min of rest in between sets. Each subject was randomly assigned (in double-blind, balanced manner) to a treatment sequence consisting of use of 3 supplements: p-synephrine (S; 100 mg), p-synephrine + caffeine (SCF; 100 mg of p-synephrine plus 100 mg of caffeine), or a placebo (P). For each supplement treatment (separated by 1 week), subjects consumed the supplement for 3 days prior to each protocol and the morning of each protocol, and subsequently did not consume any supplements for 3 days following (i.e. wash-out period). On each protocol day, subjects reported to the lab at a standard time, consumed a supplement, sat quietly for 45 min, performed the resistance exercise protocol, and sat quietly for 30 min post exercise. Performance (repetition number, force, velocity and power), blood lactate, and ratings of perceived exertion (RPE) data were collected during each protocol. Supplements SCF and S produced a significantly (P < 0.05) greater number of repetitions performed than CT (by 11.0 ± 8.0 %) and P (by 6.0 ± 7.0 %) and a 10.6 ± 12.0 % greater increase in volume load per protocol than CT and P. Most of the differences were seen during the last 3 sets. Mean power and velocity for all 6 sets were significantly higher in SCF compared to CT and P by ~6.2 ± 8.0 %. No supplement effects were observed in RPE or blood lactate, and no adverse side effects were observed or reported. S and SCF augmented resistance exercise performance (total repetitions, volume load) without increasing blood lactate or RPE. The addition of caffeine in SCF increased mean power and velocity of squat performance. These results indicate supplementation with S and SCF can enhance local muscle endurance during resistance exercise.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 115 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Spain 1 <1%
Brazil 1 <1%
United States 1 <1%
Norway 1 <1%
Sweden 1 <1%
Austria 1 <1%
Unknown 109 95%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 34 30%
Student > Master 21 18%
Unspecified 12 10%
Student > Ph. D. Student 12 10%
Researcher 8 7%
Other 28 24%
Readers by discipline Count As %
Sports and Recreations 34 30%
Nursing and Health Professions 21 18%
Unspecified 16 14%
Medicine and Dentistry 13 11%
Agricultural and Biological Sciences 9 8%
Other 22 19%

Attention Score in Context

This research output has an Altmetric Attention Score of 27. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 15 September 2018.
All research outputs
#546,168
of 12,645,670 outputs
Outputs from Journal of the International Society of Sports Nutrition
#217
of 647 outputs
Outputs of similar age
#15,714
of 243,936 outputs
Outputs of similar age from Journal of the International Society of Sports Nutrition
#1
of 1 outputs
Altmetric has tracked 12,645,670 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 95th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 647 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 46.1. This one has gotten more attention than average, scoring higher than 66% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 243,936 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 93% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them