SITTING OR STANDING: EFFECTS ON SUSTAINED ATTENTION OF SLEEP DEPRIVED STUDENTS

Brant, Valdênio Martins; Silva, Andressa; Andrade, Henrique Araújo; Narciso, Fernanda Veruska; Morais, Juliana Karine Santos; Lobo, Ingrid Ludmila Bastos; Guerreiro, Renato de Carvalho; Mello, Marco Túlio de

doi:10.4025/jphyseduc.v36i1.3634

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Original Article • J. Phys. Educ. 36 • 2025 • https://doi.org/10.4025/jphyseduc.v36i1.3634 linkcopy

SITTING OR STANDING: EFFECTS ON SUSTAINED ATTENTION OF SLEEP DEPRIVED STUDENTS

SENTADO OU EM PÉ: EFEITOS NA ATENÇÃO SUSTENTADA DE ALUNOS COM PRIVAÇÃO DE SONO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Introduction: During sleep deprivation, sustained attention is impacted by homeostatic pressure to sleep and the number of tasks. Objective: to compare the effects of 36h of sleep deprivation on psychomotor performance during a Single-Task Condition (STC) vs Dual-Task Condition (DTC) in university students. Method: During 36 hours of sleep deprivation, the Psychomotor Vigilance Task (PVT) was applied to 13 male university students, in the STC and DTC situations, sitting in a chair or standing on a force platform, every 3 hours, totaling 13 evaluations, from 08am on day 1 to 08pm on day 2. Results: There was an effect of time on the STC and DTC in all 13 evaluation moments, in all variables analyzed, except Mean RT and Slowest 10% RT, for a p-value of 0.05. No significant difference was found in the PVT variables in the comparison between the two conditions, despite a trend to significance, in the moments of homeostatic pressure to sleep in the task (05am and 02pm on day 2). Conclusion: Sleep deprivation negatively affected the psychomotor performance of participants in both conditions, demonstrating worsening of sustained attention, greater engagement of standing posture and revealing greater relaxation of sitting posture.

Keywords:
Sleep deprivation; Psychomotor vigilance task; Dual task; Performance; Posture

	Condition effect				Interaction effect				Time Effect
	(STC and DTC)				(Condition vs Time)				(13 Application Times - D1 and D2)
	F	p-value	η²	ω	F	p-value	η²	ω	F	p-value	η²	ω
Mean RT (ms)	0.90	0.35	0.04	0.15	1.41	0.25	0.06	0.33	8.49	<0.01	0.26	0.98
Slowest 10% RT (ms)	1.04	0.32	0.04	0.16	1.39	0.25	0.05	0.38	11.85	<0.01	0.33	1
Fastest 10% RT (ms)	0.16	0.69	<0.01	0.07	2.00	0.09	0.08	0.62	7.92	<0.01	0.25	1
Lapses (n)	0.60	0.45	0.02	0.11	1.02	0.4	0.04	0.32	17.9	<0.01	0.43	1
Mean 1/RT (ms)	0.02	0.89	<0.01	0.05	1.61	0.15	0.06	0.58	30.87	<0.01	0.56	1
Slowest 10% 1/RT (ms)	0.37	0.55	0.01	0.09	0.88	0.51	0.03	0.35	34.12	<0.01	0.59	1
Fastest 10% 1/RT (ms)	0.20	0.66	<0.01	0.07	1.87	0.09	0.07	0.68	5.91	<0.01	0.02	1
False Starts (n)	0.15	0.71	<0.01	0.07	1.00	0.43	0.04	0.38	9.24	<0.01	0.28	1

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Universidade Estadual de Maringá Avenida Colombo, 5790 - cep: 87020-900 - tel: 44 3011 4315 - Maringá - PR - Brazil
E-mail: revdef@uem.br

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[TFN1] PVT= Psychomotor Vigilance Task. STC= Single Task Condition. DTC= Dual Task Condition. D1= Day 1. D2= Day 2. RT= Reaction Time. ms= milliseconds. n= number. η²=Partial Eta Square. ω = Observed Power.

[TFN2] Source: Authors.