Dear friends ,
Where can i find information regarding "PNF Technique for the respiratory muscleS"?and also suggest me a good book ON "chest physiotherapy in ICU".
Thanks in advance.
With love
selva
v.selvaganapathy
physiotherapist
dp&nr
nimhans
bangalore
india
--- [log in to unmask] wrote:
>Here is a revealing article on the effect of different types of pre-event=
>=20
>stretching from the latest Journal of Strength and Conditioning Research:=
>=20
>2001, Vol. 15, No. 3, pp. 332=E2=80=93336.=20=20
>
>In showing that the popular and very misused popular interpretations of=20
>so-called "PNF stretching" can be detrimental to subsequent performance, it=
>=20
>confirms what I have been trying to show sports training groups over the pa=
>st=20
>15 years about what PNF is and what it isn't, what it is good for and what =
>it=20
>isn't good for from the point of view of its physiotherapeutic origins (my=
>=20
>first lectures on this topic in the USA were at the NSCA conference in 1989=
>).=20
> More detail on this subject of PNF usage in sport as both a neuromuscular=
>=20
>activating and relaxing system of carefully prescribed, patterned movement=
>=20
>appears in Ch 7 of Siff, M C, "Supertraining" 2000. On this forum we know=
>=20
>well that PNF is far more than the very incomplete and misused supine=20
>leg-pushing/holding method often seen being used by coaches, trainers and t=
>he=20
>like. This article addresses precisely that misleading model of "PNF=20
>stretching" which is applied by many ill-informed and poorly trained users.
>
>-------------------------------
>
>Effect of Warm-Up and Flexibility Treatments on Vertical Jump Performance
>
>J. Brian Church, Matthew S. Wiggins, F. Michael Moode, Randall Crist
>
>ABSTRACT
>
>Although different warm-up and flexibility routines are often prescribed=20
>before physical activity, little research has been conducted to determine=
>=20
>what effects these routines have on athletic performance in activities. The=
>=20
>purpose of this investigation was to determine to what degree different=20
>warm-up routines affect performance in the vertical jump test.=20
>
>The 40 female participants were asked to perform on 3 nonconsecutive days:
>
>1. a general warm-up only,=20
>2. a general warm-up and static stretching,=20
>3. a general warm-up and proprioceptive neuromuscular facilitation (PNF)=
>=20=20
>
>...The last treatment consisted of the same general warm-up, followed by=20
>proprioceptive neuromuscular facilitation (PNF) of the hamstrings and=20
>quadriceps muscle groups. The method used was the contract-relax=20
>agonist-contract (CRAC). For this method, the subjects chose partners for=
>=20
>assistance. In the CRAC
>method, the antagonist was passively stretched by the partner until the=20
>subject felt tightness. This was followed by an isometric contraction of th=
>e=20
>antagonist of the subject for 10 seconds. The subject then forcefully=20
>contracted the agonist muscles for 10 seconds followed by another passive=
>=20
>stretch of the antagonist.
>This procedure was repeated 3 times for each muscle group. Both legs were=
>=20
>stretched in methods that isolated each leg individually. Alter provides a=
>=20
>more detailed description of the CRAC procedure (2).....
>
>In the present investigation, a decreased VJ performance was demonstrated i=
>n=20
>the PNF group only. Because of similar increases in flexibility changes wit=
>h=20
>each of the 3 treatments, it must be assumed that MTU (Muscle-Tendon Unit)=
>=20
>compliance also equally changed. This might be explained by the fact that t=
>he=20
>subjects were accustomed to the static stretching procedure or that the=20
>amount of static stretching performed was not enough to cause a decrease in=
>=20
>VJ performance. Another explanation may be that multiple stretching results=
>=20
>in autogenic inhibition and fewer motor units available for contraction as=
>=20
>others have theorized . This would explain why the CRAC procedure, which do=
>es=20
>in fact require repeated bouts of stretching at the threshold of pain, was=
>=20
>the only treatment that produced a decreased VJ performance.
>
>This investigation was specific to VJ performance. Specific skills require=
>=20
>many different movements and speeds at different locations within the=20
>complete ROM that require flexibility enhancement specific to that skill.=
>=20
>Gymnastics, for example, requires a ROM that is a necessary and integral=20
>component of success in that sport. Each sport should be evaluated so that=
>=20
>adequate flexibility is attained and the ROM demands may be met to be=20
>successful and injury free.
>
>Each of the treatments was followed by a vertical jump test. A 1-way=20
>repeated-measures analysis of variance revealed a significant difference in=
>=20
>vertical jump performance.=20
>
>A post hoc analysis revealed decreased vertical jump performances for the P=
>NF=20
>treatment group. Based on the results of this study, performing PNF before =
>a=20
>vertical jump test would be detrimental to performance.
>
>...In conclusion, the PNF stretching treatment resulted in a decreased VJ=
>=20
>performance compared with the no stretching and static stretching groups.=
>=20
>Also, each treatment resulted in similar increases in flexibility of the=20
>hamstring muscles. Results from the present investigation demonstrate that=
>=20
>the longstanding belief
>that a more flexible muscle will produce better performances should be=20
>re-examined. This study seems to indicate that the "more is better"=20
>philosophy with regard to flexibility may be detrimental to performance in=
>=20
>power activities.
>
>--------------------
>
>Dr Mel C Siff
>Denver, USA
>http://groups.yahoo.com/group/Supertraining/
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