Persistent-post-concussion symptoms (PPCS) is a condition that effects on average one in seven persons following a concussion. Anxiety and depression symptoms are experienced by over one-third of those with PPCS. These symptoms can delay recovery from a concussion. Two techniques used to treat anxiety and depression symptoms are breath control and mindfulness exercises. This 8-week feasibility study will evaluate the implementation and compliance of a remote delivered breathing and mindfulness treatment program for individuals experiencing PPCS anxiety or depression symptoms.

This study will assess the feasibility of a randomized control study designed to remotely deliver a breath control and guided mindfulness exercise to individuals experiencing post-concussion symptoms of anxiety or depression. Participants will be randomized into one of the study arms after they have met eligibility criteria and have given informed consent. Study arm interventions include a 20-minute paced breathing (breath control) exercise, a 20-minute guided mindfulness exercise, and a sham control arm that incorporates a minimal instruction 20-minute quiet sitting meditation exercise. The participant is asked to complete their assigned intervention daily for a period of eight weeks and to complete weekly and biweekly follow-up questionnaires. The questionnaires will include the Rivermead Post-Concussion Syndrome Questionnaire (RPQ) and the Positive Affect Negative Affect Survey Short Form (PANAS) completed weekly, the General Anxiety and Depression questionnaire (GAD-7) and the Patient Health Questionnaire (PHQ-9) completed biweekly. These questionnaires will be completed prior to a participant commencing the study (pre-test measure), at weekly intervals throughout the study (at end of week), and at the conclusion of the 8-week study (post-test measure). At the conclusion of the study participants will be asked to complete the Treatment Acceptability / Adherence Scale (TAAS), a measure used to assess the acceptability of the intervention from the point of view of the participant. All participant outcome measures, and intervention tracking questionnaires will be administered through a secure internet user-input interface.

Inclusion Criteria:

• Ages ≥18 to ≤65 years of age
• Males and females
• Ability to comprehend English (written and spoken)
• Physician-diagnosed concussion ≥ 4weeks prior to commencing study
• Experiencing post-concussion symptoms (>0 on the RPQ)
• Experiencing symptoms of anxiety and/or depression (Score ≥ 5 on the GAD-7 or ≥ 5 on the PHQ-9)
• Access to an internet accessible device (e.g., computer, smart phone or tablet)
• Access to a smart device (iOS or Android) (required for use of "Awesome Breathing" application)

Exclusion Criteria:

• <18 or >65 years of age
• Score < 5 on the GAD-7 or < 5 on the PHQ-9
• Score 0 on RPQ
• Inability to comprehend English (written and/or spoken)
• History of cardiovascular or cardiorespiratory condition
• History of non-traumatic acquired brain injury
• History of neurological or neurodevelopment disorder
• History of unmanaged or managed psychiatric diagnosis (i.e., mental health issue, including bipolar, schizophrenia, etc.)
• No history substance abuse (drug or alcohol)
• Current pregnancy
• Currently attending other yogic or meditation/mindfulness therapy sessions

Each participant will be identified with a code based on study protocol, testing year and participant number (e.g., SP#YYPID#: SP#201001) that correlates to his or her addition to the study. The master reference that contains the decoding system will be stored on a secure server behind fire wall protection. All other data will be labeled using the participant's identification code.