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Diving response after a one-week diet and overnight fasting

Overview of attention for article published in Journal of the International Society of Sports Nutrition, April 2022
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  • Good Attention Score compared to outputs of the same age (71st percentile)
  • Average Attention Score compared to outputs of the same age and source

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2 Facebook pages

Citations

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5 Dimensions

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Title
Diving response after a one-week diet and overnight fasting
Published in
Journal of the International Society of Sports Nutrition, April 2022
DOI 10.1186/s12970-016-0134-y
Pubmed ID
Authors

Giovanna Ghiani, Elisabetta Marongiu, Sergio Olla, Marco Pinna, Matteo Pusceddu, Girolamo Palazzolo, Irene Sanna, Silvana Roberto, Antonio Crisafulli, Filippo Tocco

Abstract

We hypothesized that overnight fasting after a short dietary period, especially with carbohydrates, could allow performing breath-hold diving with no restraint for diaphragm excursion and blood shift and without any increase of metabolism, and in turn improve the diving response. During two separate sessions, 8 divers carried out two trials: (A) a 30-m depth dive, three hours after a normal breakfast and (B) a dive to the same depth, but after following a diet and fasting overnight. Each test consisted of 3 apnea phases: descent, static and ascent whose durations were measured by a standard chronometer. An impedance cardiograph, housed in an underwater torch, provided data on trans-thoracic fluid index (TFI), stroke volume (SV), heart rate (HR) and cardiac output (CO). Mean blood pressure (MBP), arterial O2 saturation (SaO2), blood glucose (Glu) and blood lactate (BLa) were also collected. In condition B, duration of the static phase of the dive was longer than A (37.8 ± 7.4 vs. 27.3 ± 8.4 s respectively, P < 0.05). In static phases, mean ∆ SV value (difference between basal and nadir values) during fasting was lower than breakfast one (-2.6 ± 5.1 vs. 5.7 ± 7.6 ml, P < 0.05). As a consequence, since mean ∆ HR values were equally decreased in both metabolic conditions, mean ∆ CO value during static after fasting was lower than the same phase after breakfast (-0.4 ± 0.5 vs. 0.4 ± 0.5 L · min(-1) respectively, P < 0.05). At emersion, despite the greater duration of dives during fasting, SaO2 was higher than A (92.0 ± 2.7 vs. 89.4 ± 2.9 % respectively, P < 0.05) and BLa was lower in the same comparison (4.2 ± 0.7 vs. 5.3 ± 1.1 mmol∙L(-1), P < 0.05). An adequate balance between metabolic and splancnic status may improve the diving response during a dive at a depth of 30 m, in safe conditions for the athlete's health.

X Demographics

X Demographics

The data shown below were collected from the profiles of 7 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 81 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 81 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 22 27%
Student > Ph. D. Student 9 11%
Student > Master 6 7%
Other 5 6%
Researcher 5 6%
Other 12 15%
Unknown 22 27%
Readers by discipline Count As %
Medicine and Dentistry 18 22%
Sports and Recreations 14 17%
Nursing and Health Professions 9 11%
Neuroscience 4 5%
Agricultural and Biological Sciences 2 2%
Other 12 15%
Unknown 22 27%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 5. 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 30 November 2016.
All research outputs
#6,121,779
of 22,875,477 outputs
Outputs from Journal of the International Society of Sports Nutrition
#617
of 885 outputs
Outputs of similar age
#124,413
of 439,297 outputs
Outputs of similar age from Journal of the International Society of Sports Nutrition
#594
of 850 outputs
Altmetric has tracked 22,875,477 research outputs across all sources so far. This one has received more attention than most of these and is in the 73rd percentile.
So far Altmetric has tracked 885 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 58.2. This one is in the 30th percentile – i.e., 30% of its peers scored the same or lower than it.
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 439,297 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 71% of its contemporaries.
We're also able to compare this research output to 850 others from the same source and published within six weeks on either side of this one. This one is in the 30th percentile – i.e., 30% of its contemporaries scored the same or lower than it.