Distraction and Redefinition in the Reduction of Low and High Intensity Experimentally-Induced Pain

1987 ◽  
Vol 7 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Debora L. Dubreuil ◽  
Norman S. Endler ◽  
Nicholas P. Spanos
Keyword(s):  
Short Duration ◽  
High Intensity ◽  
Pain Tolerance ◽  
Pressure Pain ◽  
Low Intensity ◽  
Pain Ratings ◽  
Lower Pain ◽  
Intensity Condition ◽  
Experimentally Induced

Subjects underwent either low intensity or high intensity acute focal pressure pain of relatively short duration on a baseline and posttest trial. On the posttest subjects in each intensity condition either engaged in distraction (shadowing letters), attended to sensations (redefinition) or were given no treatment (controls). Distraction was more effective than redefinition at reducing rated pain and at enhancing pain tolerance for subjects in the high intensity condition. Subjects who scored as repressors gave lower pain ratings than sensitizers. Moreover, in the high intensity condition repressors given distraction reported significant increases in pain tolerance while sensitizers given distraction showed no changes in tolerance.

scholarly journals High Frequency Non-Invasive Stimulation Over the Spine: Effects on Mood and Mechanical Pain Tolerance in Normal Subjects

1997 ◽  
Vol 10 (2-3) ◽  
pp. 61-65 ◽  
Author(s):  
A. D. Towell ◽  
D. Williams ◽  
S. G. Boyd
Keyword(s):  
High Intensity ◽  
High Frequency ◽  
Healthy Subjects ◽  
Normal Subjects ◽  
Pain Tolerance ◽  
Left Shoulder ◽  
Cutaneous Stimulation ◽  
Non Invasive ◽  
Low Intensity ◽  
Clinical Pain

We investigated the effects of non-invasive high frequency (625Hz) stimulation over the spine on mechanical pain tolerance and subjective mood. Sixty healthy subjects were divided equally into three groups receiving either high intensity (250 V), low intensity (3–4 V) or sham electrical stimulation directly over the spinal cord for 30 minutes. Following high intensity stimulation, subjects felt significantly more elated, leisurely and less tense and, contrary to reports on patients with clinical pain, had lower mechanical pain tolerances. There were no correlations between changes in mood and changes in mechanical pain tolerances. These findings contrasted with the lack of any significant differences in mood or mechanical pain tolerances in a second study where 20 subjects received either high intensity or sham stimulation across the left shoulder joint. The results indicate that decreases in mechanical pain tolerance are independent of changes in mood following non-invasive high frequency, high intensity cutaneous stimulation but that both effects are dependent on that stimulation being applied over the spine.

scholarly journals Effects of Static Stretching With High-Intensity and Short-Duration or Low-Intensity and Long-Duration on Range of Motion and Muscle Stiffness

2020 ◽  
Vol 11 ◽  
Author(s):  
Taizan Fukaya ◽  
Ryosuke Kiyono ◽  
Shigeru Sato ◽  
Kaoru Yahata ◽  
Koki Yasaka ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Range Of Motion ◽  
Short Duration ◽  
High Intensity ◽  
Muscle Stiffness ◽  
Static Stretching ◽  
Low Intensity ◽  
Shear Elastic Modulus ◽  
Passive Torque ◽  
Long Duration

This study investigated the effects of static stretching (SS) delivered with the same load but using two protocols – high-intensity and short-duration and low-intensity and long-duration – on range of motion (ROM) and muscle stiffness. A total of 18 healthy students participated in the study. They randomly performed high-intensity and short-duration (120% and 100 s) or low-intensity and long-duration (50% and 240 s) SS. Outcomes were assessed on ROM, passive torque at dorsiflexion ROM, and shear elastic modulus of the medial gastrocnemius before and after static stretching. The results showed that ROM increased significantly at post-stretching compared to that at pre-stretching in both high-intensity and short-duration [+6.1° ± 4.6° (Δ25.7 ± 19.9%)] and low-intensity and long-duration [+3.6° ± 2.3° (Δ16.0 ± 11.8%)]. Also, the ROM was significantly higher at post-stretching in high-intensity and short-duration conditions than that in low-intensity and long-duration. The passive torque at dorsiflexion ROM was significantly increased in both high-intensity and short-duration [+5.8 ± 12.8 Nm (Δ22.9 ± 40.5%)] and low-intensity and long-duration [+2.1 ± 3.4 Nm (Δ6.9 ± 10.8%)] conditions, but no significant differences were observed between both conditions. The shear elastic modulus was significantly decreased in both high-intensity and short-duration [−8.8 ± 6.1 kPa (Δ − 38.8 ± 14.5%)] and low-intensity and long-duration [−8.0 ± 12.8 kPa (Δ − 22.2 ± 33.8%)] conditions. Moreover, the relative change in shear elastic modulus in the high-intensity and short-duration SS was significantly greater than that in low-intensity and long-duration SS. Our results suggest that a higher intensity of the static stretching should be conducted to increase ROM and decrease muscle stiffness, even for a short time.

scholarly journals Regular Cannabis Use Associated With Lower Pain Tolerance and Greater Pain-Related Interference: Results from Laboratory and Ecologically Relevant Assessments

2020 ◽  
Author(s):  
Julio Alejandro Yanes ◽  
Meredith A. Reid ◽  
Lauren Yvette Atlas ◽  
Jarred W. Younger ◽  
Raul Gonzalez ◽  
...  
Keyword(s):  
Linear Models ◽  
Pain Scale ◽  
Pain Tolerance ◽  
Cannabis Use ◽  
Long Term Effects ◽  
Linear Mixed Effects ◽  
Pain Ratings ◽  
Lower Pain ◽  
Internet Study

Substantial effort has been directed toward understanding complex associations between cannabis and pain, yet we have many, and sometimes conflicting, theories regarding cannabinoid analgesia. Although acute effects of cannabis on pain have received considerable attention, long-term effects remain understudied. Two studies were conducted. First, during the laboratory study, we measured pain ratings and pain tolerance in response to pressure-based mechanical pain among recreational cannabis users (n = 33) and cannabis non-users (n = 31). Linear mixed-effects models demonstrated that: (i) pain ratings (0-100 VAS) were not different between groups (B = 1.57 (95% CI: -10.84, 13.99), p = 0.801), (ii) pain tolerance (0-240 mmHg) was associated with anxiety (B = -5.33 (95% CI: -8.29, -2.33) p < 0.001), and (iii) users had lower tolerance after controlling for anxiety (B = -24.62 (95% CI: -49.32, 0.43), p = 0.046). Second, during the internet study, we retested these associations using more ecologically relevant endpoints in a separate sample. Participants completed the Graded Chronic Pain Scale, and pain-related daily interference was compared between users (n = 185) and non-users (n = 586). Linear models showed that interference (0-10 points) was associated with anxiety (B = 0.07 (95% CI: 0.06, 0.09), p < 0.001) and users reported greater interference after controlling for anxiety (B = 0.27 (95% CI: 0.09, 0.46), p = 0.003). Together, these outcomes suggest that regular cannabis use is associated with differences in pain processing, although additional studies are needed to provide enhanced mechanistic understanding.

Experimental pressure-pain assessments: Test-retest reliability, convergence and dimensionality

2012 ◽  
Vol 3 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Tamara E. Lacourt ◽  
Jan H. Houtveen ◽  
Lorenz J.P. van Doornen
Keyword(s):  
Convergent Validity ◽  
Pain Threshold ◽  
Pressure Pain Threshold ◽  
Experimental Pain ◽  
Threshold Value ◽  
Pain Tolerance ◽  
Pressure Pain ◽  
Pain Ratings ◽  
Left And Right ◽  
Body Point

AbstractIntroductionExperimental pain studies can provide unique insight into the dimensions of pain and into individual differences in pain responsiveness by controlling different aspects of pain-eliciting stimuli and pain measures. In experimental pain studies, pain responsiveness can be assessed as pain threshold, pain tolerance or pain ratings. The test-theoretical qualities of these different measures, however, have not yet been completely documented. In the current study, several of these qualities were investigated in a pain experiment applying different algometric techniques. The objective of the study was to investigate the reliability (test–retest) and the convergent validity (correspondence) of the different methods found in the literature of measuring pressure-pain threshold, and the interrelationship between pressure-pain threshold, pressure-pain tolerance, and pressure-pain ratings.MethodsSixty-six healthy female subjects were enrolled in the study. All pressure stimuli were applied by a trained investigator, using a digital algometer with a 1 cm2 rubber tip. Pressure-pain thresholds were assessed repeatedly on six different body points (i.e. left and right calf one third of total calf muscle length below the popliteal space), the lower back (5 cm left and right from the L3), and left and right forearm (thickest part of brachioradialis muscle). Next, pressure-pain tolerance was measured on the thumbnail of the non-dominant hand, followed by rating affective and sensory components (on visual analogue scales) of a stimulus at tolerance level. Last, affective and sensory ratings were obtained for two pressure intensities.ResultsWith intraclass correlations above .75 for pain responses per body point, test–retest reliability was found to be good. However, values obtained from all first measurements were significantly higher as compared with the two succeeding ones. Convergent validity of pain thresholds across different body points was found to be high for all combinations assessed (Cronbach’s alpha values >.80), but the highest for bilateral similar body parts (>.89). Finally, principal components analysis including measures of threshold, tolerance and pain ratings yielded a three-factor solution that explained 81.9% of the variance: Moderate-level stimulus appraisal & pain tolerance; Pain threshold; Tolerance-level stimulus appraisal.Conclusion and implicationsFindings of the current study were used to formulate recommendations for future algometric pain studies. Concerning pressure-pain threshold, it is recommended to exclude first measurements for every body point from further analyses, as these measurements were found to be consistently higher compared with the following measurements. Further, no more than two consecutive measurements (after the first measurement) are needed for a reliable mean threshold value per body point. When combining threshold values of several body points into one mean-aggregated threshold value, we suggest to combine bilateral similar points, as convergent validity values were highest for these combinations. The three-factor solution that was found with principal components analyses indicates that pressure-pain threshold, subjective ratings of moderate intensity stimuli, and subjective ratings of the maximum (tolerance) intensity are distinct aspects of pain responsiveness. It is therefore recommended to include a measure of each of these three dimensions of pain when assessing pressure pain responsiveness. Some limitations of our study are discussed.

scholarly journals Effect of Exercise Intensity on Cell-Mediated Immunity

Sports ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 8
Author(s):  
Katsuhiko Suzuki ◽  
Harumi Hayashida
Keyword(s):  
Immune System ◽  
Immune Function ◽  
Short Duration ◽  
High Intensity ◽  
Moderate Intensity ◽  
Cell Mediated Immunity ◽  
Immune Functions ◽  
Moderate Intensity Exercise ◽  
Physical Strain ◽  
Low Intensity

Moderate-intensity exercise is considered to enhance immune function and to be useful for preventing acute upper respiratory infections and similar conditions. Many people practice low-intensity short-duration exercise with the expectation of a beneficial effect on immunocompetency. However, it is difficult to affirm the existence of definite evidence of such a benefit. In this article, we discuss the effects of low-intensity short-duration exercise on cell-mediated immunity, and contrast them to the effects of high-intensity and long-duration exercise. Whereas high-intensity exercise induces inflammation and reduces cell-mediated immune system function, low-intensity exercise does not appear to have a large effect on either inflammation or cell-mediated immune function. Low-intensity exercises such as walking and yoga, which are helpful to relieve stress, cannot be considered as harmful to the immune system. Although yoga was shown to impose fewer restrictions on breathing and physical strain, the evidence that yoga enhances cell-mediated immunity remains insufficient. Therefore, further studies are needed to examine the exercise mode that may be most effective for improvement of immune functions.

scholarly journals Effect of different Kinesio tape tensions on experimentally-induced thermal and muscle pain in healthy adults

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259433
Author(s):  
Keith E. Naugle ◽  
Jason Hackett ◽  
Dania Aqeel ◽  
Kelly M. Naugle
Keyword(s):  
Muscle Pain ◽  
Repeated Measures ◽  
Kinesio Tape ◽  
Pain Thresholds ◽  
Pressure Pain ◽  
Laboratory Design ◽  
Pressure Pain Thresholds ◽  
Pain Ratings ◽  
Post Test ◽  
Experimentally Induced

Athletes and rehabilitation specialists have used Kinesio tape (KT) to help alleviate pain symptoms. Currently, no clear mechanism exists as to why pain is relieved with the use of KT and whether the pain relieving effect is simply a placebo effect. Additionally, the most effective taping parameters (tension of tape) for pain reduction remain unknown. We used quantitative sensory testing to address these key gaps in the KT and pain literature. Using a repeated-measures laboratory design, we examined whether KT applied at different tensions reduces experimentally-induced pain compared to a no tape condition and KT with minimal tension. Heat pain thresholds (HPT’s), pressure pain thresholds (PPT’s), and pressure pain suprathreshold (PPS: 125% of PPT) tests were administered to the forearm prior to and during KT and no tape conditions. Tape was applied to the ventral forearm at 25% of max tension, 75% of max tension, and no tension (placebo). Repeated measures ANOVA’s evaluated the pain outcomes between conditions and across time. KT had no significant effect on PPT’s and HPT’s (p’s >0.05). The ANOVA on PPS revealed that KT applied at 25% of tension significantly reduced pain ratings from the pretest (M = 34.4, SE = 5.5) to post-test 1 (M = 30.3, SE = 4.7) and post-test 2 (M = 30.4, SE = 4.7). No other conditions significantly reduced suprathreshold pressure pain. However, pain ratings at posttest-1 during the no-tape condition (M = 36.4, SE = 5.3) were significantly greater than pain ratings during post-test 1 and post-test 2 of all three tape conditions. In conclusion, the current study revealed that KT applied at low tension is the optimal tension to reduce pressure-evoked muscle pain. Additionally, the results suggested that KT applied at low, high, or no tension may acutely prevent increased muscle sensitivity with repeated pressure stimulation.

scholarly journals Effects of pre-exercise acupuncture stimulation on heart rate response during short-duration exercise

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Hidehiro Nakahara ◽  
Shin-ya Ueda ◽  
Eriko Kawai ◽  
Rui Higashiura ◽  
Tadayoshi Miyamoto
Keyword(s):  
Heart Rate ◽  
Short Duration ◽  
High Intensity ◽  
Perceived Exertion ◽  
Heart Rate Response ◽  
High Intensity Exercise ◽  
Rating Of Perceived Exertion ◽  
Manual Acupuncture ◽  
Low Intensity ◽  
Acupuncture Stimulation

Abstract Background The purpose of the present study was to investigate the effects of bradycardia induced by pre-exercise acupuncture on heart rate responses during short-duration exercise. Methods A total of 29 healthy subjects underwent two protocols: protocol 1 assessed the effects of manual acupuncture on heart rate response during rest, and protocol 2 tested the hypothesis that the bradycardic effects induced by pre-exercise acupuncture continue during low- and high-intensity exercise. Their average age, height, weight, and body mass index were 21.2 ± 2.0 years, 167.2 ± 8.8 cm, 63.8 ± 12.8 kg, and 22.7 ± 3.5 kg/m2, respectively. In acupuncture stimulations for protocols 1 and 2, an acupuncture needle was inserted into the lower leg and manual acupuncture stimulation was performed at 1 Hz. Results In protocol 1 (resting condition), acupuncture stimulation induced a bradycardic response, which continued for 4 min after the cessation of acupuncture stimulation (p < 0.05). In protocol 2, the bradycardic response induced by pre-exercise acupuncture stimulation remained during low-intensity exercise and in the beginning of high-intensity exercise performed immediately after the cessation of acupuncture stimulation (p < 0.05). However, the effects disappeared when post-acupuncture exercise was performed when the heart rate was approximately 140 beats/min during high-intensity exercise. The rating of perceived exertion after exercise differed significantly between the acupuncture stimulation task (7.9 ± 1.6) and no-stimulation task (8.5 ± 2.0) (p = 0.03) only in the low intensity group. Conclusion This study may provide new insights into the effect of acupuncture stimulation on psycho-physiological conditions during exercise.

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