Example: bankruptcy

CORE STABILIZATION EXERCISES ENHANCE …

Journal of Strength and Conditioning Research, 2007, 21(4), 1305-1309 2007 National Strength & Conditioning AssociationCORE STABILIZATION EXERCISES ENHANCE LACTATECLEARANCE FOLLOWING HIGH-INTENSITY EXERCISEJAMES W. NAVALTA* AND STEPHEN P, HRNCIR'Department of Physical Education and Recreation, Western Kentucky University, Bowling Green, Kentucky42101; '^English Department, Trinity High School, Trinity, Texas Navalta, , and Hrncir Jr. core stabilizationexercises ENHANCE lactate clearance following high-intensity ex-ercise.

1306 NAVALTA AND HRNCIR FIGURE 1. Core stabilization exercise 1: supine position with knees bent followed by fle\aLiou of the hips. Consists of 2-second

Tags:

  Exercise, Core, Stabilization, Enhance, Core stabilization exercises enhance

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Other abuse

Transcription of CORE STABILIZATION EXERCISES ENHANCE …

1 Journal of Strength and Conditioning Research, 2007, 21(4), 1305-1309 2007 National Strength & Conditioning AssociationCORE STABILIZATION EXERCISES ENHANCE LACTATECLEARANCE FOLLOWING HIGH-INTENSITY EXERCISEJAMES W. NAVALTA* AND STEPHEN P, HRNCIR'Department of Physical Education and Recreation, Western Kentucky University, Bowling Green, Kentucky42101; '^English Department, Trinity High School, Trinity, Texas Navalta, , and Hrncir Jr. core stabilizationexercises ENHANCE lactate clearance following high-intensity ex-ercise.

2 J. Strength Cond. Res. 21(4):1305-1309. 2007. Dynamicactivities such as running, cycling, and swimming have beenshown to effectively reduce lactate in the postexercise period. Itis unknown whether core STABILIZATION EXERCISES performed fol-lowing an intense bout would exhibit a similar effect. study was designed to assess the extent of the lactate re-sponse with core STABILIZATION EXERCISES following high-intensityanaerobic exercise . Subjects (A^ - 12) reported twice for testing,and on both occasions baseline lactate was obtained after 5 min-utes of seated rest.

3 Subjects then performed a 30-second Win-fjate anaerobic cycle test, immediately followed by a blood lac-tate sample. In the 5-minute postexercise period, subjects eitherrested quietly or performed core STABILIZATION EXERCISES . A finalblood lactate sample was obtained following the 5-minute inter-vention period. Analysis revealed a significant interaction (p ). Lactate values were similar at rest ( core - , rest= mmol-L ') and immediately after exercise ( core = , rest - mmol-L ').

4 However, core stabiliza-tion EXERCISES performed during the 5-minute postexercise peri-od reduced lactate values when compared to rest ( mmol-L '). The results of this study show that per-fonning core STABILIZATION EXERCISES during a recovery period sig-nificantly reduces lactate values. The reduction in lactate maybe due to removal via increased blood flow or enhanced uptakeinto the core musculature. Incorporation of core stability exer-cises into a cool-down period following muscular work may re-sult in benefits to both lactate clearance as well as enhancedpostural WORDS, lactic acid, trunk, lumbo-pelvic-hip complexINTRODUCTION^^^d t is well known that exercise at intensitiesJ I above the anaerobic threshold results in the ac-T I cumulation of lactic acid (1, 23).

5 Lactate that/"^^_^ has been accumulated during exercise isV. cleared primarily by muscle tissue. Hermansenand Vaage reported that glycogen synthesis at this sitemay be the primary mechanism for lactate removal (16),while Astrand et al. confirmed that approximately 50% ofthe lactate formed during intense exercise is convertedinto glycogen in the muscle during recovery (2). It is im-portant to note, however, that lactate is related only toacid-base disruptions and acidity and is a consequence ofworking muscle rather than the cause of acidosis (28).

6 Indeed, the formation of lactate serves as an importantphysiological buffer that protects the muscle cell againstmetabolic acidosis and allows high-intensity exercise tobe extended for a period of time (28). Since muscle aci-dosis has been shown to inhibit oxidative phosphorylation(18), clearance of protons is important for continued mus-cular has been established that an active recovei*y follow-ing exercise serves to significantly reduce lactate and as-sociated protons in the postexercise period compared torest (4, 5, 6, 29).

7 Various modes of recovery exercise havebeen shown to decrease the lactate accumulated duringexercise. Denadai et al. found that running or swimmingas recovery modes significantly reduced lactate comparedto passive recovery after high-intensity exercise (9). Bo-nen and Belcastro observed greater decreases in lactatevalues when subjects performed continuous jogging or in-termittent jogging compared to a passive recovery (7).McLellan and Skinner found that lactate removal was en-hanced following cycle exercise when recovery was car-ried out just below the aerobic threshold (22), and Mo-nedero and Donne reported that recovery consisting ofboth cycling and massage was effective in reducing lacticacid buildup following a maximal effort exercise test (24).

8 The core musculature is considered to be all the mus-cles that have an attachment at the lumbo-pelvic-hip(LPH) complex. Training of these muscles typically fol-lows a progression from core stability ( , the ability tomaintain posture during an exercise ) to core strength( , improvement in functional contractility of the mus-culature) to core power EXERCISES ( , the ability of thecore musculature to produce force that is transferred toother parts of the body during explosive movement).

9 As afoundation, core training EXERCISES involve little joint mo-tion and are designed primarily to improve intrinsic sta-bilization of the LPH complex before core strength orpower EXERCISES are considered in a training program. In-creased ability to stabilize the LPH complex is thought toincrease the performance of various athletic and sport-related skills. Although core stability programs havefailed to show performance benefits in the limited liter-ature to date (32, 33), progi'ams have been successfulwhen aimed at decreasing low back pain or enhancingtrunk musculature (8, 19, 25).

10 In addition, strength andconditioning coaches from all of the major professionalsports in this country have ranked core EXERCISES amongthe top 5 most important EXERCISES for the training oftheir athletes (10-12, 31).Active recovery typically involves some form of whole-body exercise that allows muscles to metabolize lactateand thereby facilitates quicker removal compared to aresting recovery (4). It is unknown whether EXERCISES in-volving little joint movement directed at the core mus-culature of the LPH complex would also significantly de-crease lactic acid buildup in the postexercise , the purpose of this study was to assess thelactate response to core STABILIZATION EXERCISES followinghigh-intensity anaerobic Approach to the ProblemTo examine what eHect activation of the core musculaturehad on lactate clearance.


Related search queries