Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor
Brain-derived neurotrophic factor (BDNF) is a major orchestrator of exercise-induced brain plasticity and circulating (peripheral) BDNF may have central effects. Approximately 99% of circulating BDNF is platelet-bound, and at rest ~30% of circulating platelets are stored in the spleen. Interestingly...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2017-10-01
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| Series: | Frontiers in Physiology |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fphys.2017.00746/full |
| _version_ | 1811291966974984192 |
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| author | Jeremy J. Walsh Robert F. Bentley Brendon J. Gurd Michael E. Tschakovsky |
| author_facet | Jeremy J. Walsh Robert F. Bentley Brendon J. Gurd Michael E. Tschakovsky |
| author_sort | Jeremy J. Walsh |
| collection | DOAJ |
| description | Brain-derived neurotrophic factor (BDNF) is a major orchestrator of exercise-induced brain plasticity and circulating (peripheral) BDNF may have central effects. Approximately 99% of circulating BDNF is platelet-bound, and at rest ~30% of circulating platelets are stored in the spleen. Interestingly, forearm handgrip exercise significantly elevates sympathetic outflow and has been shown to induce splenic constriction, suggesting that small muscle mass exercise could stand as a viable strategy for increasing circulating BDNF; however, the BDNF response to handgrip exercise is currently unknown.Purpose: This study examined BDNF and platelet responses to short-duration maximal (ME) and prolonged submaximal (SE) effort handgrip exercise.Methods: Healthy males (n = 18; 21.4 ± 2.1 years, BMI 25.0 ± 1.0 kg/m2) performed 10 min of ME and 30 min of SE. Blood was sampled for the determination of serum BDNF and platelet count at rest and during the last minute of exercise.Results: Compared to rest, serum BDNF significantly increased during ME (21.2%) and SE (11.2%), which displayed a non-significant trend toward an intensity-dependent response. Platelets increased in an intensity-dependent fashion compared to rest with an 8.0% increase during ME and 3.1% during SE, and these responses were significantly correlated with diastolic blood pressure responses to handgrip exercise. Further, the amount of BDNF per platelet significantly increased compared to rest during ME (13.4%) and SE (8.7%).Conclusions: Handgrip exercise evokes significant increases in serum BDNF and platelets, implicating splenic constriction as a key mechanism and confirming efficacy of this exercise model for elevating circulating BDNF. |
| first_indexed | 2024-04-13T04:37:18Z |
| format | Article |
| id | doaj.art-f2afc209f26a4bb2ad4c12dac6d2ec39 |
| institution | Directory Open Access Journal |
| issn | 1664-042X |
| language | English |
| last_indexed | 2024-04-13T04:37:18Z |
| publishDate | 2017-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physiology |
| spelling | doaj.art-f2afc209f26a4bb2ad4c12dac6d2ec392022-12-22T03:02:07ZengFrontiers Media S.A.Frontiers in Physiology1664-042X2017-10-01810.3389/fphys.2017.00746293586Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic FactorJeremy J. Walsh0Robert F. Bentley1Brendon J. Gurd2Michael E. Tschakovsky3Human Vascular Control Lab, School of Kinesiology and Health Studies, Queen's University, Kingston, ON, CanadaHuman Vascular Control Lab, School of Kinesiology and Health Studies, Queen's University, Kingston, ON, CanadaQueen's Muscle Physiology Lab, School of Kinesiology and Health Studies, Queen's University, Kingston, ON, CanadaHuman Vascular Control Lab, School of Kinesiology and Health Studies, Queen's University, Kingston, ON, CanadaBrain-derived neurotrophic factor (BDNF) is a major orchestrator of exercise-induced brain plasticity and circulating (peripheral) BDNF may have central effects. Approximately 99% of circulating BDNF is platelet-bound, and at rest ~30% of circulating platelets are stored in the spleen. Interestingly, forearm handgrip exercise significantly elevates sympathetic outflow and has been shown to induce splenic constriction, suggesting that small muscle mass exercise could stand as a viable strategy for increasing circulating BDNF; however, the BDNF response to handgrip exercise is currently unknown.Purpose: This study examined BDNF and platelet responses to short-duration maximal (ME) and prolonged submaximal (SE) effort handgrip exercise.Methods: Healthy males (n = 18; 21.4 ± 2.1 years, BMI 25.0 ± 1.0 kg/m2) performed 10 min of ME and 30 min of SE. Blood was sampled for the determination of serum BDNF and platelet count at rest and during the last minute of exercise.Results: Compared to rest, serum BDNF significantly increased during ME (21.2%) and SE (11.2%), which displayed a non-significant trend toward an intensity-dependent response. Platelets increased in an intensity-dependent fashion compared to rest with an 8.0% increase during ME and 3.1% during SE, and these responses were significantly correlated with diastolic blood pressure responses to handgrip exercise. Further, the amount of BDNF per platelet significantly increased compared to rest during ME (13.4%) and SE (8.7%).Conclusions: Handgrip exercise evokes significant increases in serum BDNF and platelets, implicating splenic constriction as a key mechanism and confirming efficacy of this exercise model for elevating circulating BDNF.http://journal.frontiersin.org/article/10.3389/fphys.2017.00746/fullthrombocytosisplateletsneurotrophinBDNF doseexercise intensityhandgrip exercise |
| spellingShingle | Jeremy J. Walsh Robert F. Bentley Brendon J. Gurd Michael E. Tschakovsky Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor Frontiers in Physiology thrombocytosis platelets neurotrophin BDNF dose exercise intensity handgrip exercise |
| title | Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor |
| title_full | Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor |
| title_fullStr | Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor |
| title_full_unstemmed | Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor |
| title_short | Short-Duration Maximal and Long-Duration Submaximal Effort Forearm Exercise Achieve Elevations in Serum Brain-Derived Neurotrophic Factor |
| title_sort | short duration maximal and long duration submaximal effort forearm exercise achieve elevations in serum brain derived neurotrophic factor |
| topic | thrombocytosis platelets neurotrophin BDNF dose exercise intensity handgrip exercise |
| url | http://journal.frontiersin.org/article/10.3389/fphys.2017.00746/full |
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