Increase in subjective well-being and psychological health after application of C8-silk lipoamino acid functionalized pigments included in a foundation.

OBJECTIVE: The aim of this study was to evaluate the effects of two foundations before (D0) and after 5 days of application (D6) on psychophysiological parameters in order to compare C8-silk lipoamino acid functionalized pigments (FA) versus pure pigments (FP). METHODS: Assessment of self-esteem, stress, mood and emotion using psychological tests and evaluation of salivary cortisol concentrations were realized on 40 healthy females using a crossover study design at D0 and D6. Four saliva samples were taken on the awakening (C1), 30 min after the awakening (during the foundation application (C2)), 1 h after the foundation application (C3) and at 1900 h (C4) at DO and D6. Area under the curve was calculated in order to obtain information about the total amount of a given substance excreted in a specific time period. RESULTS: Five days of daily application of the foundation containing the pigments treated with the C8-silk lipoamino acids induced a significant increase (P < 0.001) in self-esteem and pleasant emotion (P < 0.05), and a significant decrease in general stress (P < 0.05). This was not the case after the FP application. Cortisol concentrations presented a pronounced diurnal rhythm whatever the foundation used. At DO, no significant differences were observed between the groups. At D6, cortisol concentrations measured 30 min and 1 h after the FA application were significantly lower (P < 0.05: C6.2, P < 0.05 C6.3, respectively) than those reported after FP application. AUC, a global stress response indicator, was significantly lower in FA group as compared to FP group after 5 days of application. Subjects found a decrease in tiredness signs and thought that FA has a good coverage. CONCLUSION: Our results show that incorporation of C8-silk lipoamino acid as agent of pigment functionalization brings new benefits to a foundation. Adopting a psychophysiological approach, which is not invasive to the subjects, we show the measurement of cortisol at the same time that psychological indicators provide a scientific approach to examine the beneficial effects of a cosmetic product.

OBJECTIF: Le but de cette étude randomisée croisée était d'évaluer les effets de deux fonds de teints (pigments traditionnels (FP) versus lipoaminoacides de C8 soie (FA)) avant (D0) et après 5 jours d'application (D6) sur des paramètres psychophysiologiques. METHODES: L'évaluation de l'estime de soi, du stress, de l'humeur et des émotions conjointement à l'évaluation des concentrations de cortisol salivaire ont été réalisées sur 40 femmes. Quatre prélèvements salivaires ont été effectués le matin au réveil (C1), 30 min après (pendant l'application du fond de teint (C2)), 1h après l'application du fond de teint (C3) et à 19h00 (C4) au début (D0) et en fin d'expériementation (D6). RÉSULTATS: Cinq jours d'application quotidienne du fond de teint contenant des pigments traités au lipoaminoacides de C8 soie ont induit une augmentation significative (P <0.001) de l'estime de soi et des émotions plaisantes (P <0.05), ainsi qu'une diminution significative du stress (P < 0.05). Ces résultats n'ont pas été observés après application du pigment traditionnel (FP). En début d'expérimentation (D0), aucune différence significative n'a été observée entre les groupes concernant les concentrations de cortisol salivaire, concentrations qui présentaient un rythme diurne prononcé. A D6, les concentrations de cortisol mesurées 30 minutes et 1 heure après l'application de FA étaient significativement inférieures (P < 0.05: C6.2, P < 0.05: C6.3, respectivement) à celles rapportées après l'application de FP. Les sujets ont constaté une diminution des signes de fatigue. CONCLUSION: Nos résultats montrent que l'incorporation du lipoaminoacide de C8 soie en tant qu'agent de fonctionnalisation des pigments apporte de nouveaux avantages à une base de fond de teint. L'approche psychophysiologique non invasive est une excellente approche permettant d'évaluer les effets bénéfiques d'un produit cosmétique.

The Effect of Aerobic Fitness on Psychological, Attentional and Physiological Responses during a Tabata High-Intensity Interval Training Session in Healthy Young Women.

The current study examines the effects of a Tabata high-intensity interval training (HIIT) session on affective, cognitive and physiological indicators in women of different fitness levels. A total of 28 adult women (aged 24.2 ± 1.5 years) completed a 20 m shuttle run test and were then assigned to higher fitness and lower fitness groups (HF and LF, n = 14 each) according to their predicted aerobic power. On a separate occasion, participants completed a 30 min Tabata workout (six 4 min rounds separated by 1 min passive rest). Each round included eight exercises (20 s exercise and 10 s rest). Affective, physiological and cognitive responses were assessed prior to, during and after the protocol. Heart rate and blood lactate concentration increased similarly in both groups over time throughout the workout (p < 0.001). Total Mood Disturbance was higher for LF (111.4 ± 15.7) vs. HF (102.9 ± 11.7) (p = 0.48), vigor showed a level by time interaction of p = 0.006 and Activation−Deactivation Adjective Check List factors deteriorated over time (p < 0.001). The Concentration Grid Test was better overall for HF (10.5 ± 3.6) vs. LF (8.6 ± 3.6) (p = 0.05). The Feeling Scale and Rating of Perceived Exertion worsened similarly in both groups over time (p = 0.002 and p < 0.001, respectively). Positive and negative affect and arousal did not differ between groups or change over time (p > 0.05). These results show that, despite the different levels of aerobic fitness, physiological, metabolic, perceptual and affective responses were similar in the two groups of women during a 30 min Tabata session. This may imply that affective responses during this type of HIIT are independent of aerobic fitness.

Performance Optimization in Sport: A Psychophysiological Approach

In the last 20 years, there was a growing interest in the study of the theoretical and applied issues surrounding psychophysiological processes underlying performance. The psychophysiological monitoring, which enables the study of these processes, consists of the assessment of the activation and functioning level of the organism using a multidimensional approach. In sport, it can be used to attain a better understanding of the processes underlying athletic performance and to improve it. The most frequently used ecological techniques include electromyography (EMG), electrocardiography (ECG), electroencephalography (EEG), and the assessment of electrodermal activity and breathing rhythm. The purpose of this paper is to offer an overview of the use of these techniques in applied interventions in sport and physical exercise and to give athletes, coaches and sport psychology experts new insights for performance improvement.(AU)